var bibbase_data = {"data":"<img src=\"//bibbase.org/img/ajax-loader.gif\" id=\"spinner\"\n  style=\"display: none;\" alt=\"Loading..\" />\n\n<div id=\"bibbase\">\n\n  <script type=\"text/javascript\">\n    var bibbase = {\n      params: {\"bib\":\"https://api.zotero.org/groups/5031656/items?key=fjGefKq410E6kFUSeCNAdmnj&format=bibtex&limit=100\",\"jsonp\":\"1\",\"host\":\"bibbase.org\",\"ssl\":false},\n      data: [{\"bibtype\":\"misc\",\"type\":\"misc\",\"title\":\"Ambiguous Resonances in Multipulse Quantum Sensing with Nitrogen Vacancy Centers\",\"url\":\"http://arxiv.org/abs/2407.09411\",\"abstract\":\"Dynamical decoupling multipulse sequences can be applied to solid state spins for sensing weak oscillating fields from nearby single nuclear spins. By periodically reversing the probing system's evolution, other noises are counteracted and filtered out over the total evolution. However, the technique is subject to intricate interactions resulting in additional resonant responses, which can be misinterpreted with the actual signal intended to be measured. We experimentally characterized three of these effects present in single nitrogen vacancy centers in diamond, where we also developed a numerical simulations model without rotating wave approximations, showing robust correlation to the experimental data. Regarding centers with the ${\\\\textasciicircum}\\\\{15\\\\}$N nitrogen isotope, we observed that a small misalignment in the bias magnetic field causes the precession of the nitrogen nuclear spin to be sensed by the electronic spin of the center. Another studied case of ambiguous resonances comes from the coupling with lattice ${\\\\textasciicircum}\\\\{13\\\\}$C nuclei, where we reconstructed the interaction Hamiltonian based on echo modulation frequencies and used this Hamiltonian to simulate multipulse sequences. Finally, we also measured and simulated the effects from the free evolution of the quantum system during finite pulse durations. Due to the large data volume and the strong dependency of these ambiguous resonances with specific experimental parameters, we provide a simulations dataset with a user-friendly graphical interface, where users can compare simulations with their own experimental data for spectral disambiguation. Although focused with nitrogen vacancy centers and dynamical decoupling sequences, these results and the developed model can potentially be applied to other solid state spins and quantum sensing techniques.\",\"urldate\":\"2024-07-26\",\"publisher\":\"arXiv\",\"author\":[{\"propositions\":[],\"lastnames\":[\"Tsunaki\"],\"firstnames\":[\"Lucas\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Singh\"],\"firstnames\":[\"Anmol\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Volkova\"],\"firstnames\":[\"Kseniia\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Trofimov\"],\"firstnames\":[\"Sergei\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Pregnolato\"],\"firstnames\":[\"Tommaso\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Schröder\"],\"firstnames\":[\"Tim\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Naydenov\"],\"firstnames\":[\"Boris\"],\"suffixes\":[]}],\"month\":\"July\",\"year\":\"2024\",\"note\":\"arXiv:2407.09411 [cond-mat, physics:quant-ph]\",\"keywords\":\"Condensed Matter - Other Condensed Matter, Quantum Physics\",\"bibtex\":\"@misc{tsunaki_ambiguous_2024,\\n\\ttitle = {Ambiguous {Resonances} in {Multipulse} {Quantum} {Sensing} with {Nitrogen} {Vacancy} {Centers}},\\n\\turl = {http://arxiv.org/abs/2407.09411},\\n\\tabstract = {Dynamical decoupling multipulse sequences can be applied to solid state spins for sensing weak oscillating fields from nearby single nuclear spins. By periodically reversing the probing system's evolution, other noises are counteracted and filtered out over the total evolution. However, the technique is subject to intricate interactions resulting in additional resonant responses, which can be misinterpreted with the actual signal intended to be measured. We experimentally characterized three of these effects present in single nitrogen vacancy centers in diamond, where we also developed a numerical simulations model without rotating wave approximations, showing robust correlation to the experimental data. Regarding centers with the \\\\${\\\\textasciicircum}\\\\{15\\\\}\\\\$N nitrogen isotope, we observed that a small misalignment in the bias magnetic field causes the precession of the nitrogen nuclear spin to be sensed by the electronic spin of the center. Another studied case of ambiguous resonances comes from the coupling with lattice \\\\${\\\\textasciicircum}\\\\{13\\\\}\\\\$C nuclei, where we reconstructed the interaction Hamiltonian based on echo modulation frequencies and used this Hamiltonian to simulate multipulse sequences. Finally, we also measured and simulated the effects from the free evolution of the quantum system during finite pulse durations. Due to the large data volume and the strong dependency of these ambiguous resonances with specific experimental parameters, we provide a simulations dataset with a user-friendly graphical interface, where users can compare simulations with their own experimental data for spectral disambiguation. Although focused with nitrogen vacancy centers and dynamical decoupling sequences, these results and the developed model can potentially be applied to other solid state spins and quantum sensing techniques.},\\n\\turldate = {2024-07-26},\\n\\tpublisher = {arXiv},\\n\\tauthor = {Tsunaki, Lucas and Singh, Anmol and Volkova, Kseniia and Trofimov, Sergei and Pregnolato, Tommaso and Schröder, Tim and Naydenov, Boris},\\n\\tmonth = jul,\\n\\tyear = {2024},\\n\\tnote = {arXiv:2407.09411 [cond-mat, physics:quant-ph]},\\n\\tkeywords = {Condensed Matter - Other Condensed Matter, Quantum Physics},\\n}\\n\\n\",\"author_short\":[\"Tsunaki, L.\",\"Singh, A.\",\"Volkova, K.\",\"Trofimov, S.\",\"Pregnolato, T.\",\"Schröder, T.\",\"Naydenov, B.\"],\"key\":\"tsunaki_ambiguous_2024\",\"id\":\"tsunaki_ambiguous_2024\",\"bibbaseid\":\"tsunaki-singh-volkova-trofimov-pregnolato-schrder-naydenov-ambiguousresonancesinmultipulsequantumsensingwithnitrogenvacancycenters-2024\",\"role\":\"author\",\"urls\":{\"Paper\":\"http://arxiv.org/abs/2407.09411\"},\"keyword\":[\"Condensed Matter - Other Condensed Matter\",\"Quantum Physics\"],\"metadata\":{\"authorlinks\":{\"schröder, t\":\"https://www.physik.hu-berlin.de/en/iqp/publications\"}},\"html\":\"\"},{\"bibtype\":\"misc\",\"type\":\"misc\",\"title\":\"The Influence of Experimental Imperfections on Photonic GHZ State Generation\",\"url\":\"http://arxiv.org/abs/2406.18257\",\"abstract\":\"While the advantages of photonic quantum computing, including direct compatibility with communication, are apparent, several imperfections such as loss and distinguishability presently limit actual implementations. These imperfections are unlikely to be completely eliminated, and it is therefore beneficial to investigate which of these are the most dominant and what is achievable under their presence. In this work, we provide an in-depth investigation of the influence of photon loss, multi-photon terms and photon distinguishability on the generation of photonic 3-partite GHZ states via established fusion protocols. We simulate the generation process for SPDC and solid-state-based single-photon sources using realistic parameters and show that different types of imperfections are dominant with respect to the fidelity and generation success probability. Our results indicate what are the dominant imperfections for the different photon sources and in which parameter regimes we can hope to implement photonic quantum computing in the near future.\",\"urldate\":\"2024-07-01\",\"author\":[{\"propositions\":[],\"lastnames\":[\"Wiesner\"],\"firstnames\":[\"Fabian\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Chrzanowski\"],\"firstnames\":[\"Helen\",\"M.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Pieplow\"],\"firstnames\":[\"Gregor\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Schröder\"],\"firstnames\":[\"Tim\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Pappa\"],\"firstnames\":[\"Anna\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Wolters\"],\"firstnames\":[\"Janik\"],\"suffixes\":[]}],\"month\":\"June\",\"year\":\"2024\",\"note\":\"arXiv:2406.18257 [quant-ph]\",\"bibtex\":\"@misc{wiesner_influence_2024,\\n\\ttitle = {The {Influence} of {Experimental} {Imperfections} on {Photonic} {GHZ} {State} {Generation}},\\n\\turl = {http://arxiv.org/abs/2406.18257},\\n\\tabstract = {While the advantages of photonic quantum computing, including direct compatibility with communication, are apparent, several imperfections such as loss and distinguishability presently limit actual implementations. These imperfections are unlikely to be completely eliminated, and it is therefore beneficial to investigate which of these are the most dominant and what is achievable under their presence. In this work, we provide an in-depth investigation of the influence of photon loss, multi-photon terms and photon distinguishability on the generation of photonic 3-partite GHZ states via established fusion protocols. We simulate the generation process for SPDC and solid-state-based single-photon sources using realistic parameters and show that different types of imperfections are dominant with respect to the fidelity and generation success probability. Our results indicate what are the dominant imperfections for the different photon sources and in which parameter regimes we can hope to implement photonic quantum computing in the near future.},\\n\\turldate = {2024-07-01},\\n\\tauthor = {Wiesner, Fabian and Chrzanowski, Helen M. and Pieplow, Gregor and Schröder, Tim and Pappa, Anna and Wolters, Janik},\\n\\tmonth = jun,\\n\\tyear = {2024},\\n\\tnote = {arXiv:2406.18257 [quant-ph]},\\n}\\n\\n\",\"author_short\":[\"Wiesner, F.\",\"Chrzanowski, H. M.\",\"Pieplow, G.\",\"Schröder, T.\",\"Pappa, A.\",\"Wolters, J.\"],\"key\":\"wiesner_influence_2024\",\"id\":\"wiesner_influence_2024\",\"bibbaseid\":\"wiesner-chrzanowski-pieplow-schrder-pappa-wolters-theinfluenceofexperimentalimperfectionsonphotonicghzstategeneration-2024\",\"role\":\"author\",\"urls\":{\"Paper\":\"http://arxiv.org/abs/2406.18257\"},\"metadata\":{\"authorlinks\":{\"schröder, t\":\"https://www.physik.hu-berlin.de/en/iqp/publications\"}},\"downloads\":3,\"html\":\"\"},{\"bibtype\":\"article\",\"type\":\"article\",\"title\":\"Coherent Microwave, Optical, and Mechanical Quantum Control of Spin Qubits in Diamond\",\"issn\":\"2511-9044, 2511-9044\",\"url\":\"https://onlinelibrary.wiley.com/doi/10.1002/qute.202300432\",\"doi\":\"10.1002/qute.202300432\",\"abstract\":\"Abstract Diamond has emerged as a highly promising platform for quantum network applications. Color centers in diamond fulfill the fundamental requirements for quantum nodes: they constitute optically accessible quantum systems with long‐lived spin qubits. Furthermore, they provide access to a quantum register of electronic and nuclear spin qubits and they mediate entanglement between spins and photons. All these operations require coherent control of the color center's spin state. This review provides a comprehensive overview of the state‐of‐the‐art, challenges, and prospects of such schemes, including high‐fidelity initialization, coherent manipulation, and readout of spin states. Established microwave and optical control techniques are reviewed, and moreover, emerging methods such as cavity‐mediated spin–photon interactions and mechanical control based on spin–phonon interactions are summarized. For different types of color centers, namely, nitrogen–vacancy and group‐IV color centers, distinct challenges persist that are subject of ongoing research. Beyond fundamental coherent spin qubit control techniques, advanced demonstrations in quantum network applications are outlined, for example, the integration of individual color centers for accessing (nuclear) multiqubit registers. Finally, the role of diamond spin qubits in the realization of future quantum information applications is described.\",\"language\":\"en\",\"urldate\":\"2024-05-17\",\"journal\":\"Advanced Quantum Technologies\",\"author\":[{\"propositions\":[],\"lastnames\":[\"Orphal‐Kobin\"],\"firstnames\":[\"Laura\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Torun\"],\"firstnames\":[\"Cem\",\"Güney\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Bopp\"],\"firstnames\":[\"Julian\",\"M.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Pieplow\"],\"firstnames\":[\"Gregor\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Schröder\"],\"firstnames\":[\"Tim\"],\"suffixes\":[]}],\"month\":\"May\",\"year\":\"2024\",\"pages\":\"2300432\",\"bibtex\":\"@article{orphalkobin_coherent_2024,\\n\\ttitle = {Coherent {Microwave}, {Optical}, and {Mechanical} {Quantum} {Control} of {Spin} {Qubits} in {Diamond}},\\n\\tissn = {2511-9044, 2511-9044},\\n\\turl = {https://onlinelibrary.wiley.com/doi/10.1002/qute.202300432},\\n\\tdoi = {10.1002/qute.202300432},\\n\\tabstract = {Abstract\\n            Diamond has emerged as a highly promising platform for quantum network applications. Color centers in diamond fulfill the fundamental requirements for quantum nodes: they constitute optically accessible quantum systems with long‐lived spin qubits. Furthermore, they provide access to a quantum register of electronic and nuclear spin qubits and they mediate entanglement between spins and photons. All these operations require coherent control of the color center's spin state. This review provides a comprehensive overview of the state‐of‐the‐art, challenges, and prospects of such schemes, including high‐fidelity initialization, coherent manipulation, and readout of spin states. Established microwave and optical control techniques are reviewed, and moreover, emerging methods such as cavity‐mediated spin–photon interactions and mechanical control based on spin–phonon interactions are summarized. For different types of color centers, namely, nitrogen–vacancy and group‐IV color centers, distinct challenges persist that are subject of ongoing research. Beyond fundamental coherent spin qubit control techniques, advanced demonstrations in quantum network applications are outlined, for example, the integration of individual color centers for accessing (nuclear) multiqubit registers. Finally, the role of diamond spin qubits in the realization of future quantum information applications is described.},\\n\\tlanguage = {en},\\n\\turldate = {2024-05-17},\\n\\tjournal = {Advanced Quantum Technologies},\\n\\tauthor = {Orphal‐Kobin, Laura and Torun, Cem Güney and Bopp, Julian M. and Pieplow, Gregor and Schröder, Tim},\\n\\tmonth = may,\\n\\tyear = {2024},\\n\\tpages = {2300432},\\n}\\n\\n\",\"author_short\":[\"Orphal‐Kobin, L.\",\"Torun, C. G.\",\"Bopp, J. M.\",\"Pieplow, G.\",\"Schröder, T.\"],\"key\":\"orphalkobin_coherent_2024\",\"id\":\"orphalkobin_coherent_2024\",\"bibbaseid\":\"orphalkobin-torun-bopp-pieplow-schrder-coherentmicrowaveopticalandmechanicalquantumcontrolofspinqubitsindiamond-2024\",\"role\":\"author\",\"urls\":{\"Paper\":\"https://onlinelibrary.wiley.com/doi/10.1002/qute.202300432\"},\"metadata\":{\"authorlinks\":{\"schröder, t\":\"https://www.physik.hu-berlin.de/en/iqp/publications\"}},\"downloads\":3,\"html\":\"\"},{\"bibtype\":\"misc\",\"type\":\"misc\",\"title\":\"Quantum Electrometer for Time-Resolved Material Science at the Atomic Lattice Scale\",\"url\":\"http://arxiv.org/abs/2401.14290\",\"doi\":\"10.48550/arXiv.2401.14290\",\"abstract\":\"The detection of individual charges plays a crucial role in fundamental material science and the advancement of classical and quantum high-performance technologies that operate with low noise. However, resolving charges at the lattice scale in a time-resolved manner has not been achieved so far. Here, we present the development of an electrometer, leveraging on the spectroscopy of an optically-active spin defect embedded in a solid-state material with a non-linear Stark response. By applying our approach to diamond, a widely used platform for quantum technology applications, we successfully localize charge traps, quantify their impact on transport dynamics and noise generation, analyze relevant material properties, and develop strategies for material optimization.\",\"urldate\":\"2024-04-10\",\"author\":[{\"propositions\":[],\"lastnames\":[\"Pieplow\"],\"firstnames\":[\"Gregor\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Torun\"],\"firstnames\":[\"Cem\",\"Güney\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Munns\"],\"firstnames\":[\"Joseph\",\"H.\",\"D.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Herrmann\"],\"firstnames\":[\"Franziska\",\"Marie\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Thies\"],\"firstnames\":[\"Andreas\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Pregnolato\"],\"firstnames\":[\"Tommaso\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Schröder\"],\"firstnames\":[\"Tim\"],\"suffixes\":[]}],\"month\":\"January\",\"year\":\"2024\",\"note\":\"arXiv:2401.14290 [cond-mat, physics:physics, physics:quant-ph]\",\"keywords\":\"Condensed Matter - Materials Science, Physics - Applied Physics, Quantum Physics\",\"bibtex\":\"@misc{pieplow_quantum_2024,\\n\\ttitle = {Quantum {Electrometer} for {Time}-{Resolved} {Material} {Science} at the {Atomic} {Lattice} {Scale}},\\n\\turl = {http://arxiv.org/abs/2401.14290},\\n\\tdoi = {10.48550/arXiv.2401.14290},\\n\\tabstract = {The detection of individual charges plays a crucial role in fundamental material science and the advancement of classical and quantum high-performance technologies that operate with low noise. However, resolving charges at the lattice scale in a time-resolved manner has not been achieved so far. Here, we present the development of an electrometer, leveraging on the spectroscopy of an optically-active spin defect embedded in a solid-state material with a non-linear Stark response. By applying our approach to diamond, a widely used platform for quantum technology applications, we successfully localize charge traps, quantify their impact on transport dynamics and noise generation, analyze relevant material properties, and develop strategies for material optimization.},\\n\\turldate = {2024-04-10},\\n\\tauthor = {Pieplow, Gregor and Torun, Cem Güney and Munns, Joseph H. D. and Herrmann, Franziska Marie and Thies, Andreas and Pregnolato, Tommaso and Schröder, Tim},\\n\\tmonth = jan,\\n\\tyear = {2024},\\n\\tnote = {arXiv:2401.14290 [cond-mat, physics:physics, physics:quant-ph]},\\n\\tkeywords = {Condensed Matter - Materials Science, Physics - Applied Physics, Quantum Physics},\\n}\\n\\n\",\"author_short\":[\"Pieplow, G.\",\"Torun, C. G.\",\"Munns, J. H. D.\",\"Herrmann, F. M.\",\"Thies, A.\",\"Pregnolato, T.\",\"Schröder, T.\"],\"key\":\"pieplow_quantum_2024\",\"id\":\"pieplow_quantum_2024\",\"bibbaseid\":\"pieplow-torun-munns-herrmann-thies-pregnolato-schrder-quantumelectrometerfortimeresolvedmaterialscienceattheatomiclatticescale-2024\",\"role\":\"author\",\"urls\":{\"Paper\":\"http://arxiv.org/abs/2401.14290\"},\"keyword\":[\"Condensed Matter - Materials Science\",\"Physics - Applied Physics\",\"Quantum Physics\"],\"metadata\":{\"authorlinks\":{\"schröder, t\":\"https://www.physik.hu-berlin.de/en/iqp/publications\"}},\"downloads\":1,\"html\":\"\"},{\"bibtype\":\"article\",\"type\":\"article\",\"title\":\"Fabrication of Sawfish photonic crystal cavities in bulk diamond\",\"volume\":\"9\",\"issn\":\"2378-0967\",\"url\":\"https://doi.org/10.1063/5.0186509\",\"doi\":\"10.1063/5.0186509\",\"abstract\":\"Color centers in diamonds are quantum systems with optically active spin-states that show long coherence times and are, therefore, a promising candidate for the development of efficient spin–photon interfaces. However, only a small portion of the emitted photons is generated by the coherent optical transition of the zero-phonon line (ZPL), which limits the overall performance of the system. Embedding these emitters in photonic crystal cavities improves the coupling to the ZPL photons and increases their emission rate. Here, we demonstrate the fabrication process of “Sawfish” cavities, a design recently proposed that has the experimentally realistic potential to simultaneously provide a high waveguide coupling efficiency and significantly enhance the emission rate. The presented process allows for the fabrication of fully suspended devices with a total length of 20.5 μm and feature sizes as small as 40 nm. The optical characterization shows fundamental mode resonances that follow the behavior expected from the corresponding design parameters and quality (Q) factors as high as (3800 ± 1200). Finally, we investigate the effects of nanofabrication on the devices and show that, despite a noticeable erosion of the fine features, the measured cavity resonances deviate by only 0.8 (1.2)% from the values estimated by simple inspection via scanning electron microscopy. This proves that the Sawfish design is robust against fabrication imperfections, which makes it an attractive choice for the development of quantum photonic networks.\",\"number\":\"3\",\"urldate\":\"2024-03-08\",\"journal\":\"APL Photonics\",\"author\":[{\"propositions\":[],\"lastnames\":[\"Pregnolato\"],\"firstnames\":[\"Tommaso\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Stucki\"],\"firstnames\":[\"Marco\",\"E.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Bopp\"],\"firstnames\":[\"Julian\",\"M.\"],\"suffixes\":[]},{\"propositions\":[\"v.\",\"d.\"],\"lastnames\":[\"Hoeven\"],\"firstnames\":[\"Maarten\",\"H.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Gokhale\"],\"firstnames\":[\"Alok\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Krüger\"],\"firstnames\":[\"Olaf\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Schröder\"],\"firstnames\":[\"Tim\"],\"suffixes\":[]}],\"month\":\"March\",\"year\":\"2024\",\"pages\":\"036105\",\"bibtex\":\"@article{pregnolato_fabrication_2024,\\n\\ttitle = {Fabrication of {Sawfish} photonic crystal cavities in bulk diamond},\\n\\tvolume = {9},\\n\\tissn = {2378-0967},\\n\\turl = {https://doi.org/10.1063/5.0186509},\\n\\tdoi = {10.1063/5.0186509},\\n\\tabstract = {Color centers in diamonds are quantum systems with optically active spin-states that show long coherence times and are, therefore, a promising candidate for the development of efficient spin–photon interfaces. However, only a small portion of the emitted photons is generated by the coherent optical transition of the zero-phonon line (ZPL), which limits the overall performance of the system. Embedding these emitters in photonic crystal cavities improves the coupling to the ZPL photons and increases their emission rate. Here, we demonstrate the fabrication process of “Sawfish” cavities, a design recently proposed that has the experimentally realistic potential to simultaneously provide a high waveguide coupling efficiency and significantly enhance the emission rate. The presented process allows for the fabrication of fully suspended devices with a total length of 20.5 μm and feature sizes as small as 40 nm. The optical characterization shows fundamental mode resonances that follow the behavior expected from the corresponding design parameters and quality (Q) factors as high as (3800 ± 1200). Finally, we investigate the effects of nanofabrication on the devices and show that, despite a noticeable erosion of the fine features, the measured cavity resonances deviate by only 0.8 (1.2)\\\\% from the values estimated by simple inspection via scanning electron microscopy. This proves that the Sawfish design is robust against fabrication imperfections, which makes it an attractive choice for the development of quantum photonic networks.},\\n\\tnumber = {3},\\n\\turldate = {2024-03-08},\\n\\tjournal = {APL Photonics},\\n\\tauthor = {Pregnolato, Tommaso and Stucki, Marco E. and Bopp, Julian M. and v. d. Hoeven, Maarten H. and Gokhale, Alok and Krüger, Olaf and Schröder, Tim},\\n\\tmonth = mar,\\n\\tyear = {2024},\\n\\tpages = {036105},\\n}\\n\\n\",\"author_short\":[\"Pregnolato, T.\",\"Stucki, M. E.\",\"Bopp, J. M.\",\"v. d. Hoeven, M. H.\",\"Gokhale, A.\",\"Krüger, O.\",\"Schröder, T.\"],\"key\":\"pregnolato_fabrication_2024\",\"id\":\"pregnolato_fabrication_2024\",\"bibbaseid\":\"pregnolato-stucki-bopp-vdhoeven-gokhale-krger-schrder-fabricationofsawfishphotoniccrystalcavitiesinbulkdiamond-2024\",\"role\":\"author\",\"urls\":{\"Paper\":\"https://doi.org/10.1063/5.0186509\"},\"metadata\":{\"authorlinks\":{\"schröder, t\":\"https://www.physik.hu-berlin.de/en/iqp/publications\"}},\"downloads\":4,\"html\":\"\"},{\"bibtype\":\"article\",\"type\":\"article\",\"title\":\"Efficient microwave spin control of negatively charged group-IV color centers in diamond\",\"volume\":\"109\",\"url\":\"https://link.aps.org/doi/10.1103/PhysRevB.109.115409\",\"doi\":\"10.1103/PhysRevB.109.115409\",\"abstract\":\"In this paper, we provide a comprehensive overview of the microwave-induced manipulation of electronic spin states in negatively charged group-IV color centers in diamond with a particular emphasis on the influence of strain. Central to our investigation is the consideration of the full vectorial attributes of the magnetic fields involved, which are a dc field for lifting the degeneracy of the spin levels and an ac field for microwave control between two spin levels. We observe an intricate interdependence between their spatial orientations, the externally applied strain, and the resultant efficacy in spin-state control. In most studies to date the ac and dc magnetic field orientations have been insufficiently addressed, which has led to the conclusion that strain is indispensable for the effective microwave control of heavier group-IV vacancies, such as tin- and lead-vacancy color centers. In contrast, we find that the alignment of the dc magnetic field orthogonal to the symmetry axis and the ac field parallel to it can make the application of strain obsolete for effective spin manipulation. Furthermore, we explore the implications of this field configuration on the spin's optical initialization, readout, and gate fidelities.\",\"number\":\"11\",\"urldate\":\"2024-03-08\",\"journal\":\"Physical Review B\",\"author\":[{\"propositions\":[],\"lastnames\":[\"Pieplow\"],\"firstnames\":[\"Gregor\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Belhassen\"],\"firstnames\":[\"Mohamed\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Schröder\"],\"firstnames\":[\"Tim\"],\"suffixes\":[]}],\"month\":\"March\",\"year\":\"2024\",\"note\":\"Publisher: American Physical Society\",\"pages\":\"115409\",\"bibtex\":\"@article{pieplow_efficient_2024,\\n\\ttitle = {Efficient microwave spin control of negatively charged group-{IV} color centers in diamond},\\n\\tvolume = {109},\\n\\turl = {https://link.aps.org/doi/10.1103/PhysRevB.109.115409},\\n\\tdoi = {10.1103/PhysRevB.109.115409},\\n\\tabstract = {In this paper, we provide a comprehensive overview of the microwave-induced manipulation of electronic spin states in negatively charged group-IV color centers in diamond with a particular emphasis on the influence of strain. Central to our investigation is the consideration of the full vectorial attributes of the magnetic fields involved, which are a dc field for lifting the degeneracy of the spin levels and an ac field for microwave control between two spin levels. We observe an intricate interdependence between their spatial orientations, the externally applied strain, and the resultant efficacy in spin-state control. In most studies to date the ac and dc magnetic field orientations have been insufficiently addressed, which has led to the conclusion that strain is indispensable for the effective microwave control of heavier group-IV vacancies, such as tin- and lead-vacancy color centers. In contrast, we find that the alignment of the dc magnetic field orthogonal to the symmetry axis and the ac field parallel to it can make the application of strain obsolete for effective spin manipulation. Furthermore, we explore the implications of this field configuration on the spin's optical initialization, readout, and gate fidelities.},\\n\\tnumber = {11},\\n\\turldate = {2024-03-08},\\n\\tjournal = {Physical Review B},\\n\\tauthor = {Pieplow, Gregor and Belhassen, Mohamed and Schröder, Tim},\\n\\tmonth = mar,\\n\\tyear = {2024},\\n\\tnote = {Publisher: American Physical Society},\\n\\tpages = {115409},\\n}\\n\\n\",\"author_short\":[\"Pieplow, G.\",\"Belhassen, M.\",\"Schröder, T.\"],\"key\":\"pieplow_efficient_2024\",\"id\":\"pieplow_efficient_2024\",\"bibbaseid\":\"pieplow-belhassen-schrder-efficientmicrowavespincontrolofnegativelychargedgroupivcolorcentersindiamond-2024\",\"role\":\"author\",\"urls\":{\"Paper\":\"https://link.aps.org/doi/10.1103/PhysRevB.109.115409\"},\"metadata\":{\"authorlinks\":{\"schröder, t\":\"https://www.physik.hu-berlin.de/en/iqp/publications\"}},\"downloads\":3,\"html\":\"\"},{\"bibtype\":\"misc\",\"type\":\"misc\",\"title\":\"Diamond-on-chip infrared absorption magnetic field camera\",\"url\":\"http://arxiv.org/abs/2401.00854\",\"doi\":\"10.48550/arXiv.2401.00854\",\"abstract\":\"Integrated and fiber-packaged magnetic field sensors with a sensitivity sufficient to sense electric pulses propagating along nerves in life science applications and with a spatial resolution fine enough to resolve their propagation directions will trigger a tremendous step ahead not only in medical diagnostics, but in understanding neural processes. Nitrogen-vacancy centers in diamond represent the leading platform for such sensing tasks under ambient conditions. Current research on uniting a good sensitivity and a high spatial resolution is facilitated by scanning or imaging techniques. However, these techniques employ moving parts or bulky microscope setups. Despite being far developed, both approaches cannot be integrated and fiber-packaged to build a robust, adjustment-free hand-held device. In this work, we introduce novel concepts for spatially resolved magnetic field sensing and 2-D gradiometry with an integrated magnetic field camera. The camera is based on infrared absorption optically detected magnetic resonance (IRA-ODMR) mediated by perpendicularly intersecting infrared and pump laser beams forming a pixel matrix. We demonstrate our 3-by-3 pixel sensor's capability to reconstruct the position of an electromagnet in space. Furthermore, we identify routes to enhance the magnetic field camera's sensitivity and spatial resolution as required for complex sensing applications.\",\"urldate\":\"2024-01-04\",\"publisher\":\"arXiv\",\"author\":[{\"propositions\":[],\"lastnames\":[\"Bopp\"],\"firstnames\":[\"Julian\",\"M.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Conradi\"],\"firstnames\":[\"Hauke\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Perona\"],\"firstnames\":[\"Felipe\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Palaci\"],\"firstnames\":[\"Anil\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Wollenberg\"],\"firstnames\":[\"Jonas\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Flisgen\"],\"firstnames\":[\"Thomas\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Liero\"],\"firstnames\":[\"Armin\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Christopher\"],\"firstnames\":[\"Heike\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Keil\"],\"firstnames\":[\"Norbert\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Knolle\"],\"firstnames\":[\"Wolfgang\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Knigge\"],\"firstnames\":[\"Andrea\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Heinrich\"],\"firstnames\":[\"Wolfgang\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Kleinert\"],\"firstnames\":[\"Moritz\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Schröder\"],\"firstnames\":[\"Tim\"],\"suffixes\":[]}],\"month\":\"December\",\"year\":\"2023\",\"note\":\"arXiv:2401.00854 [physics, physics:quant-ph]\",\"keywords\":\"Physics - Applied Physics, Physics - Optics, Quantum Physics\",\"bibtex\":\"@misc{bopp_diamond--chip_2023,\\n\\ttitle = {Diamond-on-chip infrared absorption magnetic field camera},\\n\\turl = {http://arxiv.org/abs/2401.00854},\\n\\tdoi = {10.48550/arXiv.2401.00854},\\n\\tabstract = {Integrated and fiber-packaged magnetic field sensors with a sensitivity sufficient to sense electric pulses propagating along nerves in life science applications and with a spatial resolution fine enough to resolve their propagation directions will trigger a tremendous step ahead not only in medical diagnostics, but in understanding neural processes. Nitrogen-vacancy centers in diamond represent the leading platform for such sensing tasks under ambient conditions. Current research on uniting a good sensitivity and a high spatial resolution is facilitated by scanning or imaging techniques. However, these techniques employ moving parts or bulky microscope setups. Despite being far developed, both approaches cannot be integrated and fiber-packaged to build a robust, adjustment-free hand-held device. In this work, we introduce novel concepts for spatially resolved magnetic field sensing and 2-D gradiometry with an integrated magnetic field camera. The camera is based on infrared absorption optically detected magnetic resonance (IRA-ODMR) mediated by perpendicularly intersecting infrared and pump laser beams forming a pixel matrix. We demonstrate our 3-by-3 pixel sensor's capability to reconstruct the position of an electromagnet in space. Furthermore, we identify routes to enhance the magnetic field camera's sensitivity and spatial resolution as required for complex sensing applications.},\\n\\turldate = {2024-01-04},\\n\\tpublisher = {arXiv},\\n\\tauthor = {Bopp, Julian M. and Conradi, Hauke and Perona, Felipe and Palaci, Anil and Wollenberg, Jonas and Flisgen, Thomas and Liero, Armin and Christopher, Heike and Keil, Norbert and Knolle, Wolfgang and Knigge, Andrea and Heinrich, Wolfgang and Kleinert, Moritz and Schröder, Tim},\\n\\tmonth = dec,\\n\\tyear = {2023},\\n\\tnote = {arXiv:2401.00854 [physics, physics:quant-ph]},\\n\\tkeywords = {Physics - Applied Physics, Physics - Optics, Quantum Physics},\\n}\\n\\n\",\"author_short\":[\"Bopp, J. M.\",\"Conradi, H.\",\"Perona, F.\",\"Palaci, A.\",\"Wollenberg, J.\",\"Flisgen, T.\",\"Liero, A.\",\"Christopher, H.\",\"Keil, N.\",\"Knolle, W.\",\"Knigge, A.\",\"Heinrich, W.\",\"Kleinert, M.\",\"Schröder, T.\"],\"key\":\"bopp_diamond--chip_2023\",\"id\":\"bopp_diamond--chip_2023\",\"bibbaseid\":\"bopp-conradi-perona-palaci-wollenberg-flisgen-liero-christopher-etal-diamondonchipinfraredabsorptionmagneticfieldcamera-2023\",\"role\":\"author\",\"urls\":{\"Paper\":\"http://arxiv.org/abs/2401.00854\"},\"keyword\":[\"Physics - Applied Physics\",\"Physics - Optics\",\"Quantum Physics\"],\"metadata\":{\"authorlinks\":{\"schröder, t\":\"https://www.physik.hu-berlin.de/en/iqp/publications\"}},\"downloads\":6,\"html\":\"\"},{\"bibtype\":\"article\",\"type\":\"article\",\"title\":\"‘Sawfish’ Photonic Crystal Cavity for Near-Unity Emitter-to-Fiber Interfacing in Quantum Network Applications\",\"volume\":\"n/a\",\"copyright\":\"© 2023 The Authors. Advanced Optical Materials published by Wiley-VCH GmbH\",\"issn\":\"2195-1071\",\"url\":\"https://onlinelibrary.wiley.com/doi/abs/10.1002/adom.202301286\",\"doi\":\"10.1002/adom.202301286\",\"abstract\":\"Photon loss is one of the key challenges to overcome in complex photonic quantum applications. Photon collection efficiencies directly impact the amount of resources required for measurement-based quantum computation and communication networks. Promising resources include solid-state quantum light sources. However, efficiently coupling light from a single quantum emitter to a guided mode remains demanding. In this work, photon losses are eliminated by maximizing coupling efficiencies in an emitter-to-fiber interface. A waveguide-integrated ‘Sawfish’ photonic crystal cavity is developed and finite element (FEM) simulations are employed to demonstrate that such an emitter-to-fiber interface transfers, with 97.4 % efficiency, the zero-phonon line (ZPL) emission of a negatively-charged tin vacancy center in diamond (SnV−) adiabatically to a single-mode fiber. A surrogate model trained by machine learning provides quantitative estimates of sensitivities to fabrication tolerances. The corrugation-based Sawfish design proves robust under state-of-the-art nanofabrication parameters, maintaining an emitter-to-fiber coupling efficiency of 88.6 %. Applying the Sawfish cavity to a recent one-way quantum repeater protocol substantiates its potential in reducing resource requirements in quantum communication.\",\"language\":\"en\",\"number\":\"n/a\",\"urldate\":\"2023-12-18\",\"journal\":\"Advanced Optical Materials\",\"author\":[{\"propositions\":[],\"lastnames\":[\"Bopp\"],\"firstnames\":[\"Julian\",\"M.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Plock\"],\"firstnames\":[\"Matthias\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Turan\"],\"firstnames\":[\"Tim\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Pieplow\"],\"firstnames\":[\"Gregor\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Burger\"],\"firstnames\":[\"Sven\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Schröder\"],\"firstnames\":[\"Tim\"],\"suffixes\":[]}],\"month\":\"December\",\"year\":\"2023\",\"note\":\"_eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1002/adom.202301286\",\"keywords\":\"Debye-Waller factor, Purcell enhancement, Sawfish cavity, adiabatic coupling, diamond color center, photonic crystal cavity, photonic losses\",\"pages\":\"2301286\",\"bibtex\":\"@article{bopp_sawfish_2023,\\n\\ttitle = {‘{Sawfish}’ {Photonic} {Crystal} {Cavity} for {Near}-{Unity} {Emitter}-to-{Fiber} {Interfacing} in {Quantum} {Network} {Applications}},\\n\\tvolume = {n/a},\\n\\tcopyright = {© 2023 The Authors. Advanced Optical Materials published by Wiley-VCH GmbH},\\n\\tissn = {2195-1071},\\n\\turl = {https://onlinelibrary.wiley.com/doi/abs/10.1002/adom.202301286},\\n\\tdoi = {10.1002/adom.202301286},\\n\\tabstract = {Photon loss is one of the key challenges to overcome in complex photonic quantum applications. Photon collection efficiencies directly impact the amount of resources required for measurement-based quantum computation and communication networks. Promising resources include solid-state quantum light sources. However, efficiently coupling light from a single quantum emitter to a guided mode remains demanding. In this work, photon losses are eliminated by maximizing coupling efficiencies in an emitter-to-fiber interface. A waveguide-integrated ‘Sawfish’ photonic crystal cavity is developed and finite element (FEM) simulations are employed to demonstrate that such an emitter-to-fiber interface transfers, with 97.4 \\\\% efficiency, the zero-phonon line (ZPL) emission of a negatively-charged tin vacancy center in diamond (SnV−) adiabatically to a single-mode fiber. A surrogate model trained by machine learning provides quantitative estimates of sensitivities to fabrication tolerances. The corrugation-based Sawfish design proves robust under state-of-the-art nanofabrication parameters, maintaining an emitter-to-fiber coupling efficiency of 88.6 \\\\%. Applying the Sawfish cavity to a recent one-way quantum repeater protocol substantiates its potential in reducing resource requirements in quantum communication.},\\n\\tlanguage = {en},\\n\\tnumber = {n/a},\\n\\turldate = {2023-12-18},\\n\\tjournal = {Advanced Optical Materials},\\n\\tauthor = {Bopp, Julian M. and Plock, Matthias and Turan, Tim and Pieplow, Gregor and Burger, Sven and Schröder, Tim},\\n\\tmonth = dec,\\n\\tyear = {2023},\\n\\tnote = {\\\\_eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1002/adom.202301286},\\n\\tkeywords = {Debye-Waller factor, Purcell enhancement, Sawfish cavity, adiabatic coupling, diamond color center, photonic crystal cavity, photonic losses},\\n\\tpages = {2301286},\\n}\\n\\n\",\"author_short\":[\"Bopp, J. M.\",\"Plock, M.\",\"Turan, T.\",\"Pieplow, G.\",\"Burger, S.\",\"Schröder, T.\"],\"key\":\"bopp_sawfish_2023\",\"id\":\"bopp_sawfish_2023\",\"bibbaseid\":\"bopp-plock-turan-pieplow-burger-schrder-sawfishphotoniccrystalcavityfornearunityemittertofiberinterfacinginquantumnetworkapplications-2023\",\"role\":\"author\",\"urls\":{\"Paper\":\"https://onlinelibrary.wiley.com/doi/abs/10.1002/adom.202301286\"},\"keyword\":[\"Debye-Waller factor\",\"Purcell enhancement\",\"Sawfish cavity\",\"adiabatic coupling\",\"diamond color center\",\"photonic crystal cavity\",\"photonic losses\"],\"metadata\":{\"authorlinks\":{\"schröder, t\":\"https://www.physik.hu-berlin.de/en/iqp/publications\"}},\"downloads\":5,\"html\":\"\"},{\"bibtype\":\"misc\",\"type\":\"misc\",\"title\":\"Optical probing of phononic properties of a tin-vacancy color center in diamond\",\"url\":\"http://arxiv.org/abs/2312.05335\",\"doi\":\"10.48550/arXiv.2312.05335\",\"abstract\":\"The coherence characteristics of a tin-vacancy color center in diamond are investigated through optical means including coherent population trapping between the ground state orbital levels and linewidth broadening effects. Due to the large spin-orbit splitting of the orbital ground states, thermalization between the ground states occurs at rates that are impractical to measure directly. Here, spectral information is transformed into its conjugate variable time, providing picosecond resolution and revealing an orbital depolarization timescale of $\\\\{{\\\\}sim30\\\\{{\\\\}rm{~}ps\\\\}\\\\}$. Consequences of the investigated dynamics are then used to estimate spin dephasing times limited by thermal effects.\",\"urldate\":\"2023-12-12\",\"publisher\":\"arXiv\",\"author\":[{\"propositions\":[],\"lastnames\":[\"Torun\"],\"firstnames\":[\"Cem\",\"Güney\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Munns\"],\"firstnames\":[\"Joseph\",\"H.\",\"D.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Herrmann\"],\"firstnames\":[\"Franziska\",\"Marie\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Villafane\"],\"firstnames\":[\"Viviana\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Müller\"],\"firstnames\":[\"Kai\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Thies\"],\"firstnames\":[\"Andreas\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Pregnolato\"],\"firstnames\":[\"Tommaso\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Pieplow\"],\"firstnames\":[\"Gregor\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Schröder\"],\"firstnames\":[\"Tim\"],\"suffixes\":[]}],\"month\":\"December\",\"year\":\"2023\",\"note\":\"arXiv:2312.05335 [physics, physics:quant-ph]\",\"keywords\":\"Physics - Applied Physics, Quantum Physics\",\"bibtex\":\"@misc{torun_optical_2023,\\n\\ttitle = {Optical probing of phononic properties of a tin-vacancy color center in diamond},\\n\\turl = {http://arxiv.org/abs/2312.05335},\\n\\tdoi = {10.48550/arXiv.2312.05335},\\n\\tabstract = {The coherence characteristics of a tin-vacancy color center in diamond are investigated through optical means including coherent population trapping between the ground state orbital levels and linewidth broadening effects. Due to the large spin-orbit splitting of the orbital ground states, thermalization between the ground states occurs at rates that are impractical to measure directly. Here, spectral information is transformed into its conjugate variable time, providing picosecond resolution and revealing an orbital depolarization timescale of \\\\$\\\\{{\\\\textbackslash}sim30\\\\{{\\\\textbackslash}rm{\\\\textasciitilde}ps\\\\}\\\\}\\\\$. Consequences of the investigated dynamics are then used to estimate spin dephasing times limited by thermal effects.},\\n\\turldate = {2023-12-12},\\n\\tpublisher = {arXiv},\\n\\tauthor = {Torun, Cem Güney and Munns, Joseph H. D. and Herrmann, Franziska Marie and Villafane, Viviana and Müller, Kai and Thies, Andreas and Pregnolato, Tommaso and Pieplow, Gregor and Schröder, Tim},\\n\\tmonth = dec,\\n\\tyear = {2023},\\n\\tnote = {arXiv:2312.05335 [physics, physics:quant-ph]},\\n\\tkeywords = {Physics - Applied Physics, Quantum Physics},\\n}\\n\\n\",\"author_short\":[\"Torun, C. G.\",\"Munns, J. H. D.\",\"Herrmann, F. M.\",\"Villafane, V.\",\"Müller, K.\",\"Thies, A.\",\"Pregnolato, T.\",\"Pieplow, G.\",\"Schröder, T.\"],\"key\":\"torun_optical_2023\",\"id\":\"torun_optical_2023\",\"bibbaseid\":\"torun-munns-herrmann-villafane-mller-thies-pregnolato-pieplow-etal-opticalprobingofphononicpropertiesofatinvacancycolorcenterindiamond-2023\",\"role\":\"author\",\"urls\":{\"Paper\":\"http://arxiv.org/abs/2312.05335\"},\"keyword\":[\"Physics - Applied Physics\",\"Quantum Physics\"],\"metadata\":{\"authorlinks\":{\"schröder, t\":\"https://www.physik.hu-berlin.de/en/iqp/publications\"}},\"html\":\"\"},{\"bibtype\":\"misc\",\"type\":\"misc\",\"title\":\"AlGaN photonic device platform\",\"url\":\"http://arxiv.org/abs/2312.03128\",\"doi\":\"10.48550/arXiv.2312.03128\",\"abstract\":\"In the rapidly evolving area of integrated photonics, there is a growing need for materials to support the fast development of advanced and more complex optical on-chip systems. Present photonic material platforms have significantly progressed over the past years; however, at the same time, they face critical challenges. We introduce a novel material for integrated photonics and investigate Aluminum Gallium Nitride (AlGaN) on Aluminum Nitride (AlN) templates as a platform for developing reconfigurable and on-chip nonlinear optical devices. AlGaN combines compatibility with standard fabrication technologies and high electro-optic modulation capabilities with reduced loss in a broad spectrum, making it a viable material for advanced photonic applications. We engineer and grow light-guiding photonic layers and fabricate waveguides, directional couplers, and other on-chip devices. Our AlGaN ring resonators demonstrate tunability and high Q-factors due to the low-loss waveguiding. The comprehensive platform paves the way for nonlinear photon-pair generation applications, on-chip nonlinear quantum frequency conversion, and fast electro-optic modulation for switching and routing.\",\"urldate\":\"2023-12-11\",\"publisher\":\"arXiv\",\"author\":[{\"propositions\":[],\"lastnames\":[\"Gündogdu\"],\"firstnames\":[\"Sinan\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Pazzagli\"],\"firstnames\":[\"Sofia\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Pregnolato\"],\"firstnames\":[\"Tommaso\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Kolbe\"],\"firstnames\":[\"Tim\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Hagedorn\"],\"firstnames\":[\"Sylvia\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Weyers\"],\"firstnames\":[\"Markus\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Schröder\"],\"firstnames\":[\"Tim\"],\"suffixes\":[]}],\"month\":\"December\",\"year\":\"2023\",\"note\":\"arXiv:2312.03128 [physics]\",\"keywords\":\"Physics - Applied Physics, Physics - Optics\",\"bibtex\":\"@misc{gundogdu_algan_2023,\\n\\ttitle = {{AlGaN} photonic device platform},\\n\\turl = {http://arxiv.org/abs/2312.03128},\\n\\tdoi = {10.48550/arXiv.2312.03128},\\n\\tabstract = {In the rapidly evolving area of integrated photonics, there is a growing need for materials to support the fast development of advanced and more complex optical on-chip systems. Present photonic material platforms have significantly progressed over the past years; however, at the same time, they face critical challenges. We introduce a novel material for integrated photonics and investigate Aluminum Gallium Nitride (AlGaN) on Aluminum Nitride (AlN) templates as a platform for developing reconfigurable and on-chip nonlinear optical devices. AlGaN combines compatibility with standard fabrication technologies and high electro-optic modulation capabilities with reduced loss in a broad spectrum, making it a viable material for advanced photonic applications. We engineer and grow light-guiding photonic layers and fabricate waveguides, directional couplers, and other on-chip devices. Our AlGaN ring resonators demonstrate tunability and high Q-factors due to the low-loss waveguiding. The comprehensive platform paves the way for nonlinear photon-pair generation applications, on-chip nonlinear quantum frequency conversion, and fast electro-optic modulation for switching and routing.},\\n\\turldate = {2023-12-11},\\n\\tpublisher = {arXiv},\\n\\tauthor = {Gündogdu, Sinan and Pazzagli, Sofia and Pregnolato, Tommaso and Kolbe, Tim and Hagedorn, Sylvia and Weyers, Markus and Schröder, Tim},\\n\\tmonth = dec,\\n\\tyear = {2023},\\n\\tnote = {arXiv:2312.03128 [physics]},\\n\\tkeywords = {Physics - Applied Physics, Physics - Optics},\\n}\\n\\n\",\"author_short\":[\"Gündogdu, S.\",\"Pazzagli, S.\",\"Pregnolato, T.\",\"Kolbe, T.\",\"Hagedorn, S.\",\"Weyers, M.\",\"Schröder, T.\"],\"key\":\"gundogdu_algan_2023\",\"id\":\"gundogdu_algan_2023\",\"bibbaseid\":\"gndogdu-pazzagli-pregnolato-kolbe-hagedorn-weyers-schrder-alganphotonicdeviceplatform-2023\",\"role\":\"author\",\"urls\":{\"Paper\":\"http://arxiv.org/abs/2312.03128\"},\"keyword\":[\"Physics - Applied Physics\",\"Physics - Optics\"],\"metadata\":{\"authorlinks\":{\"schröder, t\":\"https://www.physik.hu-berlin.de/en/iqp/publications\"}},\"downloads\":1,\"html\":\"\"},{\"bibtype\":\"misc\",\"type\":\"misc\",\"title\":\"Deterministic Creation of Large Photonic Multipartite Entangled States with Group-IV Color Centers in Diamond\",\"url\":\"http://arxiv.org/abs/2312.03952\",\"doi\":\"10.48550/arXiv.2312.03952\",\"abstract\":\"Measurement-based quantum computation relies on single qubit measurements of large multipartite entangled states, so-called lattice-graph or cluster states. Graph states are also an important resource for quantum communication, where tree cluster states are a key resource for one-way quantum repeaters. A photonic realization of this kind of state would inherit many of the benefits of photonic platforms, such as very little dephasing due to weak environmental interactions and the well-developed infrastructure to route and measure photonic qubits. In this work, a linear cluster state and GHZ state generation scheme is developed for group-IV color centers. In particular, this article focuses on an in-depth investigation of the required control operations, including the coherent spin and excitation gates. We choose an off-resonant Raman scheme for the spin gates, which can be much faster than microwave control. We do not rely on a reduced level scheme and use efficient approximations to design high-fidelity Raman gates. We benchmark the spin-control and excitation scheme using the tin vacancy color center coupled to a cavity, assuming a realistic experimental setting. Additionally, the article investigates the fidelities of the Raman and excitation gates in the presence of radiative and non-radiative decay mechanisms. Finally, a quality measure is devised, which emphasizes the importance of fast and high-fidelity spin gates in the creation of large entangled photonic states.\",\"urldate\":\"2023-12-11\",\"publisher\":\"arXiv\",\"author\":[{\"propositions\":[],\"lastnames\":[\"Pieplow\"],\"firstnames\":[\"Gregor\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Strocka\"],\"firstnames\":[\"Yannick\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Isaza-Monsalve\"],\"firstnames\":[\"Mariano\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Munns\"],\"firstnames\":[\"Joseph\",\"H.\",\"D.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Schröder\"],\"firstnames\":[\"Tim\"],\"suffixes\":[]}],\"month\":\"December\",\"year\":\"2023\",\"note\":\"arXiv:2312.03952 [quant-ph]\",\"keywords\":\"Quantum Physics\",\"bibtex\":\"@misc{pieplow_deterministic_2023,\\n\\ttitle = {Deterministic {Creation} of {Large} {Photonic} {Multipartite} {Entangled} {States} with {Group}-{IV} {Color} {Centers} in {Diamond}},\\n\\turl = {http://arxiv.org/abs/2312.03952},\\n\\tdoi = {10.48550/arXiv.2312.03952},\\n\\tabstract = {Measurement-based quantum computation relies on single qubit measurements of large multipartite entangled states, so-called lattice-graph or cluster states. Graph states are also an important resource for quantum communication, where tree cluster states are a key resource for one-way quantum repeaters. A photonic realization of this kind of state would inherit many of the benefits of photonic platforms, such as very little dephasing due to weak environmental interactions and the well-developed infrastructure to route and measure photonic qubits. In this work, a linear cluster state and GHZ state generation scheme is developed for group-IV color centers. In particular, this article focuses on an in-depth investigation of the required control operations, including the coherent spin and excitation gates. We choose an off-resonant Raman scheme for the spin gates, which can be much faster than microwave control. We do not rely on a reduced level scheme and use efficient approximations to design high-fidelity Raman gates. We benchmark the spin-control and excitation scheme using the tin vacancy color center coupled to a cavity, assuming a realistic experimental setting. Additionally, the article investigates the fidelities of the Raman and excitation gates in the presence of radiative and non-radiative decay mechanisms. Finally, a quality measure is devised, which emphasizes the importance of fast and high-fidelity spin gates in the creation of large entangled photonic states.},\\n\\turldate = {2023-12-11},\\n\\tpublisher = {arXiv},\\n\\tauthor = {Pieplow, Gregor and Strocka, Yannick and Isaza-Monsalve, Mariano and Munns, Joseph H. D. and Schröder, Tim},\\n\\tmonth = dec,\\n\\tyear = {2023},\\n\\tnote = {arXiv:2312.03952 [quant-ph]},\\n\\tkeywords = {Quantum Physics},\\n}\\n\\n\",\"author_short\":[\"Pieplow, G.\",\"Strocka, Y.\",\"Isaza-Monsalve, M.\",\"Munns, J. H. D.\",\"Schröder, T.\"],\"key\":\"pieplow_deterministic_2023\",\"id\":\"pieplow_deterministic_2023\",\"bibbaseid\":\"pieplow-strocka-isazamonsalve-munns-schrder-deterministiccreationoflargephotonicmultipartiteentangledstateswithgroupivcolorcentersindiamond-2023\",\"role\":\"author\",\"urls\":{\"Paper\":\"http://arxiv.org/abs/2312.03952\"},\"keyword\":[\"Quantum Physics\"],\"metadata\":{\"authorlinks\":{\"schröder, t\":\"https://www.physik.hu-berlin.de/en/iqp/publications\"}},\"downloads\":1,\"html\":\"\"},{\"bibtype\":\"misc\",\"type\":\"misc\",\"title\":\"SUPER and subpicosecond coherent control of an optical qubit in a tin-vacancy color center in diamond\",\"url\":\"http://arxiv.org/abs/2312.05246\",\"doi\":\"10.48550/arXiv.2312.05246\",\"abstract\":\"The coherent excitation of an optically active spin system is one of the key elements in the engineering of a spin-photon interface. In this work, we use the novel SUPER scheme, employing nonresonant ultrashort optical pulses, to coherently control the main optical transition of a tin-vacancy color center in diamond, a promising emitter that can both be utilized as a quantum memory and a single-photon source. Furthermore, we implement a subpicosecond control scheme using resonant pulses for achieving record short quantum gates applied to diamond color centers. The employed ultrafast quantum gates open up a new regime of quantum information processing with solid-state color centers, eventually enabling multi-gate operations with the optical qubit and efficient spectral filtering of the excitation laser from deterministically prepared coherent photons.\",\"urldate\":\"2023-12-11\",\"publisher\":\"arXiv\",\"author\":[{\"propositions\":[],\"lastnames\":[\"Torun\"],\"firstnames\":[\"Cem\",\"Güney\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Gökçe\"],\"firstnames\":[\"Mustafa\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Bracht\"],\"firstnames\":[\"Thomas\",\"K.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Monsalve\"],\"firstnames\":[\"Mariano\",\"Isaza\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Benbouabdellah\"],\"firstnames\":[\"Sarah\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Nacitarhan\"],\"firstnames\":[\"Özgün\",\"Ozan\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Stucki\"],\"firstnames\":[\"Marco\",\"E.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Markham\"],\"firstnames\":[\"Matthew\",\"L.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Pieplow\"],\"firstnames\":[\"Gregor\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Pregnolato\"],\"firstnames\":[\"Tommaso\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Munns\"],\"firstnames\":[\"Joseph\",\"H.\",\"D.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Reiter\"],\"firstnames\":[\"Doris\",\"E.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Schröder\"],\"firstnames\":[\"Tim\"],\"suffixes\":[]}],\"month\":\"December\",\"year\":\"2023\",\"note\":\"arXiv:2312.05246 [quant-ph]\",\"keywords\":\"Quantum Physics\",\"bibtex\":\"@misc{torun_super_2023,\\n\\ttitle = {{SUPER} and subpicosecond coherent control of an optical qubit in a tin-vacancy color center in diamond},\\n\\turl = {http://arxiv.org/abs/2312.05246},\\n\\tdoi = {10.48550/arXiv.2312.05246},\\n\\tabstract = {The coherent excitation of an optically active spin system is one of the key elements in the engineering of a spin-photon interface. In this work, we use the novel SUPER scheme, employing nonresonant ultrashort optical pulses, to coherently control the main optical transition of a tin-vacancy color center in diamond, a promising emitter that can both be utilized as a quantum memory and a single-photon source. Furthermore, we implement a subpicosecond control scheme using resonant pulses for achieving record short quantum gates applied to diamond color centers. The employed ultrafast quantum gates open up a new regime of quantum information processing with solid-state color centers, eventually enabling multi-gate operations with the optical qubit and efficient spectral filtering of the excitation laser from deterministically prepared coherent photons.},\\n\\turldate = {2023-12-11},\\n\\tpublisher = {arXiv},\\n\\tauthor = {Torun, Cem Güney and Gökçe, Mustafa and Bracht, Thomas K. and Monsalve, Mariano Isaza and Benbouabdellah, Sarah and Nacitarhan, Özgün Ozan and Stucki, Marco E. and Markham, Matthew L. and Pieplow, Gregor and Pregnolato, Tommaso and Munns, Joseph H. D. and Reiter, Doris E. and Schröder, Tim},\\n\\tmonth = dec,\\n\\tyear = {2023},\\n\\tnote = {arXiv:2312.05246 [quant-ph]},\\n\\tkeywords = {Quantum Physics},\\n}\\n\\n\",\"author_short\":[\"Torun, C. G.\",\"Gökçe, M.\",\"Bracht, T. K.\",\"Monsalve, M. I.\",\"Benbouabdellah, S.\",\"Nacitarhan, Ö. O.\",\"Stucki, M. E.\",\"Markham, M. L.\",\"Pieplow, G.\",\"Pregnolato, T.\",\"Munns, J. H. D.\",\"Reiter, D. E.\",\"Schröder, T.\"],\"key\":\"torun_super_2023\",\"id\":\"torun_super_2023\",\"bibbaseid\":\"torun-gke-bracht-monsalve-benbouabdellah-nacitarhan-stucki-markham-etal-superandsubpicosecondcoherentcontrolofanopticalqubitinatinvacancycolorcenterindiamond-2023\",\"role\":\"author\",\"urls\":{\"Paper\":\"http://arxiv.org/abs/2312.05246\"},\"keyword\":[\"Quantum Physics\"],\"metadata\":{\"authorlinks\":{\"schröder, t\":\"https://www.physik.hu-berlin.de/en/iqp/publications\"}},\"downloads\":3,\"html\":\"\"},{\"bibtype\":\"misc\",\"type\":\"misc\",\"title\":\"Resource-efficient fault-tolerant one-way quantum repeater with code concatenation\",\"url\":\"http://arxiv.org/abs/2306.07224\",\"doi\":\"10.48550/arXiv.2306.07224\",\"abstract\":\"One-way quantum repeaters where loss and operational errors are counteracted by quantum error correcting codes can ensure fast and reliable qubit transmission in quantum networks. It is crucial that the resource requirements of such repeaters, for example, the number of qubits per repeater node and the complexity of the quantum error correcting operations are kept to a minimum to allow for near-future implementations. To this end, we propose a one-way quantum repeater that targets both the loss and operational error rates in a communication channel in a resource-efficient manner using code concatenation. Specifically, we consider a tree-cluster code as an inner loss-tolerant code concatenated with an outer 5-qubit code for protection against Pauli errors. Adopting flag-based stabilizer measurements, we show that intercontinental distances of up to 10,000 km can be bridged with a minimal resource overhead by interspersing repeater nodes that each specializes in suppressing either loss or operational errors. Our work demonstrates how tailored error-correcting codes can significantly lower the experimental requirements for long-distance quantum communication.\",\"urldate\":\"2023-11-16\",\"publisher\":\"arXiv\",\"author\":[{\"propositions\":[],\"lastnames\":[\"Wo\"],\"firstnames\":[\"Kah\",\"Jen\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Avis\"],\"firstnames\":[\"Guus\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Rozpędek\"],\"firstnames\":[\"Filip\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Mor-Ruiz\"],\"firstnames\":[\"Maria\",\"Flors\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Pieplow\"],\"firstnames\":[\"Gregor\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Schröder\"],\"firstnames\":[\"Tim\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Jiang\"],\"firstnames\":[\"Liang\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Sørensen\"],\"firstnames\":[\"Anders\",\"Søndberg\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Borregaard\"],\"firstnames\":[\"Johannes\"],\"suffixes\":[]}],\"month\":\"October\",\"year\":\"2023\",\"note\":\"arXiv:2306.07224 [quant-ph]\",\"keywords\":\"Quantum Physics\",\"bibtex\":\"@misc{wo_resource-efficient_2023,\\n\\ttitle = {Resource-efficient fault-tolerant one-way quantum repeater with code concatenation},\\n\\turl = {http://arxiv.org/abs/2306.07224},\\n\\tdoi = {10.48550/arXiv.2306.07224},\\n\\tabstract = {One-way quantum repeaters where loss and operational errors are counteracted by quantum error correcting codes can ensure fast and reliable qubit transmission in quantum networks. It is crucial that the resource requirements of such repeaters, for example, the number of qubits per repeater node and the complexity of the quantum error correcting operations are kept to a minimum to allow for near-future implementations. To this end, we propose a one-way quantum repeater that targets both the loss and operational error rates in a communication channel in a resource-efficient manner using code concatenation. Specifically, we consider a tree-cluster code as an inner loss-tolerant code concatenated with an outer 5-qubit code for protection against Pauli errors. Adopting flag-based stabilizer measurements, we show that intercontinental distances of up to 10,000 km can be bridged with a minimal resource overhead by interspersing repeater nodes that each specializes in suppressing either loss or operational errors. Our work demonstrates how tailored error-correcting codes can significantly lower the experimental requirements for long-distance quantum communication.},\\n\\turldate = {2023-11-16},\\n\\tpublisher = {arXiv},\\n\\tauthor = {Wo, Kah Jen and Avis, Guus and Rozpędek, Filip and Mor-Ruiz, Maria Flors and Pieplow, Gregor and Schröder, Tim and Jiang, Liang and Sørensen, Anders Søndberg and Borregaard, Johannes},\\n\\tmonth = oct,\\n\\tyear = {2023},\\n\\tnote = {arXiv:2306.07224 [quant-ph]},\\n\\tkeywords = {Quantum Physics},\\n}\\n\\n\",\"author_short\":[\"Wo, K. J.\",\"Avis, G.\",\"Rozpędek, F.\",\"Mor-Ruiz, M. F.\",\"Pieplow, G.\",\"Schröder, T.\",\"Jiang, L.\",\"Sørensen, A. S.\",\"Borregaard, J.\"],\"key\":\"wo_resource-efficient_2023\",\"id\":\"wo_resource-efficient_2023\",\"bibbaseid\":\"wo-avis-rozpdek-morruiz-pieplow-schrder-jiang-srensen-etal-resourceefficientfaulttolerantonewayquantumrepeaterwithcodeconcatenation-2023\",\"role\":\"author\",\"urls\":{\"Paper\":\"http://arxiv.org/abs/2306.07224\"},\"keyword\":[\"Quantum Physics\"],\"metadata\":{\"authorlinks\":{\"schröder, t\":\"https://www.physik.hu-berlin.de/en/iqp/publications\"}},\"downloads\":2,\"html\":\"\"},{\"bibtype\":\"inproceedings\",\"type\":\"inproceedings\",\"title\":\"‘Sawfish’ Spin-Photon Interface for Near-Unity Emitter-to-Waveguide Coupling\",\"copyright\":\"&#169; 2023 The Author(s)\",\"url\":\"https://opg.optica.org/abstract.cfm?uri=CLEO_SI-2023-SF1O.6\",\"doi\":\"10.1364/CLEO_SI.2023.SF1O.6\",\"abstract\":\"Interfacing spin-active solid-state quantum emitters or memories with photons remains a challenging task due to photon losses. We propose and demonstrate the ‘Sawfish’ photonic crystal cavity to eliminate photon losses at spin-photon interfaces.\",\"language\":\"EN\",\"urldate\":\"2023-08-29\",\"booktitle\":\"CLEO 2023 (2023), paper SF1O.6\",\"publisher\":\"Optica Publishing Group\",\"author\":[{\"propositions\":[],\"lastnames\":[\"Bopp\"],\"firstnames\":[\"Julian\",\"M.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Plock\"],\"firstnames\":[\"Matthias\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Turan\"],\"firstnames\":[\"Tim\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Pieplow\"],\"firstnames\":[\"Gregor\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Burger\"],\"firstnames\":[\"Sven\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Schröder\"],\"firstnames\":[\"Tim\"],\"suffixes\":[]}],\"month\":\"May\",\"year\":\"2023\",\"pages\":\"SF1O.6\",\"bibtex\":\"@inproceedings{bopp_sawfish_2023-1,\\n\\ttitle = {‘{Sawfish}’ {Spin}-{Photon} {Interface} for {Near}-{Unity} {Emitter}-to-{Waveguide} {Coupling}},\\n\\tcopyright = {\\\\&\\\\#169; 2023 The Author(s)},\\n\\turl = {https://opg.optica.org/abstract.cfm?uri=CLEO_SI-2023-SF1O.6},\\n\\tdoi = {10.1364/CLEO_SI.2023.SF1O.6},\\n\\tabstract = {Interfacing spin-active solid-state quantum emitters or memories with photons remains a challenging task due to photon losses. We propose and demonstrate the ‘Sawfish’ photonic crystal cavity to eliminate photon losses at spin-photon interfaces.},\\n\\tlanguage = {EN},\\n\\turldate = {2023-08-29},\\n\\tbooktitle = {{CLEO} 2023 (2023), paper {SF1O}.6},\\n\\tpublisher = {Optica Publishing Group},\\n\\tauthor = {Bopp, Julian M. and Plock, Matthias and Turan, Tim and Pieplow, Gregor and Burger, Sven and Schröder, Tim},\\n\\tmonth = may,\\n\\tyear = {2023},\\n\\tpages = {SF1O.6},\\n}\\n\\n\",\"author_short\":[\"Bopp, J. M.\",\"Plock, M.\",\"Turan, T.\",\"Pieplow, G.\",\"Burger, S.\",\"Schröder, T.\"],\"key\":\"bopp_sawfish_2023-1\",\"id\":\"bopp_sawfish_2023-1\",\"bibbaseid\":\"bopp-plock-turan-pieplow-burger-schrder-sawfishspinphotoninterfacefornearunityemittertowaveguidecoupling-2023\",\"role\":\"author\",\"urls\":{\"Paper\":\"https://opg.optica.org/abstract.cfm?uri=CLEO_SI-2023-SF1O.6\"},\"metadata\":{\"authorlinks\":{\"schröder, t\":\"https://www.physik.hu-berlin.de/en/iqp/publications\"}},\"downloads\":4,\"html\":\"\"},{\"bibtype\":\"inproceedings\",\"type\":\"inproceedings\",\"title\":\"Overcoming Spectral Diffusion for Enhanced Spin-Photon Entanglement using NV Defect Centers in Diamond Nanostructures\",\"copyright\":\"&#169; 2023 The Author(s)\",\"url\":\"https://opg.optica.org/abstract.cfm?uri=CLEO_FS-2023-FTh1A.6\",\"doi\":\"10.1364/CLEO_FS.2023.FTh1A.6\",\"abstract\":\"Optically coherent NV defect centers in diamond nanostructures are demonstrated using a combination of methods that mitigate spectral diffusion, including sample choice, fabrication, and experimental control. Entanglement rates enhanced by orders of magnitude are proposed.\",\"language\":\"EN\",\"urldate\":\"2023-08-29\",\"booktitle\":\"CLEO 2023 (2023), paper FTh1A.6\",\"publisher\":\"Optica Publishing Group\",\"author\":[{\"propositions\":[],\"lastnames\":[\"Orphal-Kobin\"],\"firstnames\":[\"Laura\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Unterguggenberger\"],\"firstnames\":[\"Kilian\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Pregnolato\"],\"firstnames\":[\"Tommaso\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Kemf\"],\"firstnames\":[\"Natalia\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Matalla\"],\"firstnames\":[\"Mathias\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Unger\"],\"firstnames\":[\"Ralph-Stephan\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Ostermay\"],\"firstnames\":[\"Ina\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Pieplow\"],\"firstnames\":[\"Gregor\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Schröder\"],\"firstnames\":[\"Tim\"],\"suffixes\":[]}],\"month\":\"May\",\"year\":\"2023\",\"pages\":\"FTh1A.6\",\"bibtex\":\"@inproceedings{orphal-kobin_overcoming_2023,\\n\\ttitle = {Overcoming {Spectral} {Diffusion} for {Enhanced} {Spin}-{Photon} {Entanglement} using {NV} {Defect} {Centers} in {Diamond} {Nanostructures}},\\n\\tcopyright = {\\\\&\\\\#169; 2023 The Author(s)},\\n\\turl = {https://opg.optica.org/abstract.cfm?uri=CLEO_FS-2023-FTh1A.6},\\n\\tdoi = {10.1364/CLEO_FS.2023.FTh1A.6},\\n\\tabstract = {Optically coherent NV defect centers in diamond nanostructures are demonstrated using a combination of methods that mitigate spectral diffusion, including sample choice, fabrication, and experimental control. Entanglement rates enhanced by orders of magnitude are proposed.},\\n\\tlanguage = {EN},\\n\\turldate = {2023-08-29},\\n\\tbooktitle = {{CLEO} 2023 (2023), paper {FTh1A}.6},\\n\\tpublisher = {Optica Publishing Group},\\n\\tauthor = {Orphal-Kobin, Laura and Unterguggenberger, Kilian and Pregnolato, Tommaso and Kemf, Natalia and Matalla, Mathias and Unger, Ralph-Stephan and Ostermay, Ina and Pieplow, Gregor and Schröder, Tim},\\n\\tmonth = may,\\n\\tyear = {2023},\\n\\tpages = {FTh1A.6},\\n}\\n\\n\",\"author_short\":[\"Orphal-Kobin, L.\",\"Unterguggenberger, K.\",\"Pregnolato, T.\",\"Kemf, N.\",\"Matalla, M.\",\"Unger, R.\",\"Ostermay, I.\",\"Pieplow, G.\",\"Schröder, T.\"],\"key\":\"orphal-kobin_overcoming_2023\",\"id\":\"orphal-kobin_overcoming_2023\",\"bibbaseid\":\"orphalkobin-unterguggenberger-pregnolato-kemf-matalla-unger-ostermay-pieplow-etal-overcomingspectraldiffusionforenhancedspinphotonentanglementusingnvdefectcentersindiamondnanostructures-2023\",\"role\":\"author\",\"urls\":{\"Paper\":\"https://opg.optica.org/abstract.cfm?uri=CLEO_FS-2023-FTh1A.6\"},\"metadata\":{\"authorlinks\":{\"schröder, t\":\"https://www.physik.hu-berlin.de/en/iqp/publications\"}},\"downloads\":4,\"html\":\"\"},{\"bibtype\":\"patent\",\"type\":\"patent\",\"title\":\"Sensor for measuring a magnetic field\",\"url\":\"https://patents.google.com/patent/EP4099041A1/en\",\"abstract\":\"An embodiment of the invention relates to a sensor comprising a sensor element (10) for measuring a magnetic field, the sensor element (10) comprising a set of at least two first input ports (Il), a set of at least two exit ports (E) each of which is connected to one of the first input ports (I1) via a corresponding first beam path (B1), a set of at least two second input ports (12) each of which is connected to a second beam path (B2), wherein the first beam paths (B1) extend through a common plane (CP) located inside the sensor element (10), said plane (CP) comprising a plurality of magneto-optically responsive defect centers, wherein the second beam paths (B2) also extend through said common plane (CP), but are angled with respect to the first beam paths (B1) such that a plurality of intersections between the first and second beam paths (B2) is defined, and wherein each intersection forms a sensor pixel (P) located at at least one of said magneto-optically responsive defect centers.\",\"nationality\":\"EP\",\"assignee\":\"Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV, Humboldt Universitaet zu Berlin\",\"number\":\"EP4099041A1\",\"urldate\":\"2023-08-08\",\"author\":[{\"propositions\":[],\"lastnames\":[\"Schröder\"],\"firstnames\":[\"Tim\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"MARTINEZ\"],\"firstnames\":[\"Felipe\",\"PERONA\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"BOPP\"],\"firstnames\":[\"Julian\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"KLEINERT\"],\"firstnames\":[\"Moritz\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"CONRADI\"],\"firstnames\":[\"Hauke\"],\"suffixes\":[]}],\"month\":\"December\",\"year\":\"2022\",\"keywords\":\"beam paths, emitter, radiation, sensor, sensor element\",\"bibtex\":\"@patent{schroder_sensor_2022,\\n\\ttitle = {Sensor for measuring a magnetic field},\\n\\turl = {https://patents.google.com/patent/EP4099041A1/en},\\n\\tabstract = {An embodiment of the invention relates to a sensor comprising a sensor element (10) for measuring a magnetic field, the sensor element (10) comprising a set of at least two first input ports (Il), a set of at least two exit ports (E) each of which is connected to one of the first input ports (I1) via a corresponding first beam path (B1), a set of at least two second input ports (12) each of which is connected to a second beam path (B2), wherein the first beam paths (B1) extend through a common plane (CP) located inside the sensor element (10), said plane (CP) comprising a plurality of magneto-optically responsive defect centers, wherein the second beam paths (B2) also extend through said common plane (CP), but are angled with respect to the first beam paths (B1) such that a plurality of intersections between the first and second beam paths (B2) is defined, and wherein each intersection forms a sensor pixel (P) located at at least one of said magneto-optically responsive defect centers.},\\n\\tnationality = {EP},\\n\\tassignee = {Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV, Humboldt Universitaet zu Berlin},\\n\\tnumber = {EP4099041A1},\\n\\turldate = {2023-08-08},\\n\\tauthor = {Schröder, Tim and MARTINEZ, Felipe PERONA and BOPP, Julian and KLEINERT, Moritz and CONRADI, Hauke},\\n\\tmonth = dec,\\n\\tyear = {2022},\\n\\tkeywords = {beam paths, emitter, radiation, sensor, sensor element},\\n}\\n\\n\",\"author_short\":[\"Schröder, T.\",\"MARTINEZ, F. P.\",\"BOPP, J.\",\"KLEINERT, M.\",\"CONRADI, H.\"],\"key\":\"schroder_sensor_2022\",\"id\":\"schroder_sensor_2022\",\"bibbaseid\":\"schrder-martinez-bopp-kleinert-conradi-sensorformeasuringamagneticfield-2022\",\"role\":\"author\",\"urls\":{\"Paper\":\"https://patents.google.com/patent/EP4099041A1/en\"},\"keyword\":[\"beam paths\",\"emitter\",\"radiation\",\"sensor\",\"sensor element\"],\"metadata\":{\"authorlinks\":{\"schröder, t\":\"https://www.physik.hu-berlin.de/en/iqp/publications\"}},\"downloads\":2,\"html\":\"\"},{\"bibtype\":\"incollection\",\"type\":\"incollection\",\"title\":\"Quantum Optics with Solid-State Color Centers\",\"copyright\":\"© 2023 Wiley-VCH GmbH\",\"isbn\":\"978-3-527-83742-7\",\"url\":\"https://onlinelibrary.wiley.com/doi/abs/10.1002/9783527837427.ch19\",\"abstract\":\"With the chapter “Quantum Optics with Solid-State Color Centers,” we provide a comprehensive overview of color centers in wide-bandgap materials: We describe their generation and energy level schemes, how they are controlled both optically and via microwaves, and how they are used in quantum optics and technology. The chapter summarizes landmark experiments including applications ranging from single photon generation, over quantum memories, quantum gates, to entanglement generation. We structured the chapter such that the reader has access to a bottom-up introduction but can also directly jump to sections of interest. This work is directed at graduate students up to the principal investigator level.\",\"language\":\"en\",\"urldate\":\"2023-07-26\",\"booktitle\":\"Photonic Quantum Technologies\",\"publisher\":\"John Wiley & Sons, Ltd\",\"author\":[{\"propositions\":[],\"lastnames\":[\"Munns\"],\"firstnames\":[\"Joseph\",\"H.D.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Orphal-Kobin\"],\"firstnames\":[\"Laura\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Pieplow\"],\"firstnames\":[\"Gregor\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Schröder\"],\"firstnames\":[\"Tim\"],\"suffixes\":[]}],\"year\":\"2023\",\"doi\":\"10.1002/9783527837427.ch19\",\"note\":\"Section: 19 _eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1002/9783527837427.ch19\",\"keywords\":\"color centers, diamond, optically active solid-state spin defects, quantum optics, quantum technology, review, silicon carbide, single photon emitters, wide-bandgap materials\",\"pages\":\"509–562\",\"bibtex\":\"@incollection{munns_quantum_2023,\\n\\ttitle = {Quantum {Optics} with {Solid}-{State} {Color} {Centers}},\\n\\tcopyright = {© 2023 Wiley-VCH GmbH},\\n\\tisbn = {978-3-527-83742-7},\\n\\turl = {https://onlinelibrary.wiley.com/doi/abs/10.1002/9783527837427.ch19},\\n\\tabstract = {With the chapter “Quantum Optics with Solid-State Color Centers,” we provide a comprehensive overview of color centers in wide-bandgap materials: We describe their generation and energy level schemes, how they are controlled both optically and via microwaves, and how they are used in quantum optics and technology. The chapter summarizes landmark experiments including applications ranging from single photon generation, over quantum memories, quantum gates, to entanglement generation. We structured the chapter such that the reader has access to a bottom-up introduction but can also directly jump to sections of interest. This work is directed at graduate students up to the principal investigator level.},\\n\\tlanguage = {en},\\n\\turldate = {2023-07-26},\\n\\tbooktitle = {Photonic {Quantum} {Technologies}},\\n\\tpublisher = {John Wiley \\\\& Sons, Ltd},\\n\\tauthor = {Munns, Joseph H.D. and Orphal-Kobin, Laura and Pieplow, Gregor and Schröder, Tim},\\n\\tyear = {2023},\\n\\tdoi = {10.1002/9783527837427.ch19},\\n\\tnote = {Section: 19\\n\\\\_eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1002/9783527837427.ch19},\\n\\tkeywords = {color centers, diamond, optically active solid-state spin defects, quantum optics, quantum technology, review, silicon carbide, single photon emitters, wide-bandgap materials},\\n\\tpages = {509--562},\\n}\\n\\n\",\"author_short\":[\"Munns, J. H.\",\"Orphal-Kobin, L.\",\"Pieplow, G.\",\"Schröder, T.\"],\"key\":\"munns_quantum_2023\",\"id\":\"munns_quantum_2023\",\"bibbaseid\":\"munns-orphalkobin-pieplow-schrder-quantumopticswithsolidstatecolorcenters-2023\",\"role\":\"author\",\"urls\":{\"Paper\":\"https://onlinelibrary.wiley.com/doi/abs/10.1002/9783527837427.ch19\"},\"keyword\":[\"color centers\",\"diamond\",\"optically active solid-state spin defects\",\"quantum optics\",\"quantum technology\",\"review\",\"silicon carbide\",\"single photon emitters\",\"wide-bandgap materials\"],\"metadata\":{\"authorlinks\":{\"schröder, t\":\"https://www.physik.hu-berlin.de/en/iqp/publications\"}},\"downloads\":4,\"html\":\"\"},{\"bibtype\":\"book\",\"type\":\"book\",\"title\":\"Photonic Quantum Technologies: Science and Applications\",\"isbn\":\"978-3-527-41412-3\",\"shorttitle\":\"Photonic Quantum Technologies\",\"abstract\":\"Brings together top-level research results to enable the development of practical quantum devices In Photonic Quantum Technologies: Science and Applications, the editor Mohamed Benyoucef and a team of distinguished scientists from different disciplines deliver an authoritative, one-stop overview of up-to-date research on various quantum systems. This unique book reviews the state-of-the-art research in photonic quantum technologies and bridges the fundamentals of the field with applications to provide readers from academia and industry, in one-location resource, with cutting-edge knowledge they need to have to understand and develop practical quantum systems for application in e.g., secure quantum communication, quantum metrology, and quantum computing. The book also addresses fundamental and engineering challenges en route to workable quantum devices and ways to circumvent or overcome them. Readers will also find: A thorough introduction to the fundamentals of quantum technologies, including discussions of the second quantum revolution (by Nobel Laureate Alain Aspect), solid-state quantum optics, and non-classical light and quantum entanglement Comprehensive explorations of emerging quantum technologies and their practical applications, including quantum repeaters, satellite-based quantum communication, quantum networks, silicon quantum photonics, integrated quantum systems, and future vision Practical discussions of quantum technologies with artificial atoms, color centers, 2D materials, molecules, atoms, ions, atom-atom entanglement, and optical clocks Perfect for molecular and solid-state physicists, Photonic Quantum Technologies: Science and Applications will also benefit industrial and academic researchers in photonics and quantum optics, graduate students in the field; engineers, chemists, and computer and material scientists.\",\"language\":\"en\",\"publisher\":\"Wiley\",\"author\":[{\"propositions\":[],\"lastnames\":[\"Benyoucef\"],\"firstnames\":[\"Mohamed\"],\"suffixes\":[]}],\"month\":\"July\",\"year\":\"2023\",\"note\":\"Google-Books-ID: GFGAzgEACAAJ\",\"keywords\":\"Science / Physics / Electromagnetism, Science / Physics / Optics & Light\",\"bibtex\":\"@book{benyoucef_photonic_2023,\\n\\ttitle = {Photonic {Quantum} {Technologies}: {Science} and {Applications}},\\n\\tisbn = {978-3-527-41412-3},\\n\\tshorttitle = {Photonic {Quantum} {Technologies}},\\n\\tabstract = {Brings together top-level research results to enable the development of practical quantum devices In Photonic Quantum Technologies: Science and Applications, the editor Mohamed Benyoucef and a team of distinguished scientists from different disciplines deliver an authoritative, one-stop overview of up-to-date research on various quantum systems. This unique book reviews the state-of-the-art research in photonic quantum technologies and bridges the fundamentals of the field with applications to provide readers from academia and industry, in one-location resource, with cutting-edge knowledge they need to have to understand and develop practical quantum systems for application in e.g., secure quantum communication, quantum metrology, and quantum computing. The book also addresses fundamental and engineering challenges en route to workable quantum devices and ways to circumvent or overcome them. Readers will also find:  A thorough introduction to the fundamentals of quantum technologies, including discussions of the second quantum revolution (by Nobel Laureate Alain Aspect), solid-state quantum optics, and non-classical light and quantum entanglement Comprehensive explorations of emerging quantum technologies and their practical applications, including quantum repeaters, satellite-based quantum communication, quantum networks, silicon quantum photonics, integrated quantum systems, and future vision Practical discussions of quantum technologies with artificial atoms, color centers, 2D materials, molecules, atoms, ions, atom-atom entanglement, and optical clocks  Perfect for molecular and solid-state physicists, Photonic Quantum Technologies: Science and Applications will also benefit industrial and academic researchers in photonics and quantum optics, graduate students in the field; engineers, chemists, and computer and material scientists.},\\n\\tlanguage = {en},\\n\\tpublisher = {Wiley},\\n\\tauthor = {Benyoucef, Mohamed},\\n\\tmonth = jul,\\n\\tyear = {2023},\\n\\tnote = {Google-Books-ID: GFGAzgEACAAJ},\\n\\tkeywords = {Science / Physics / Electromagnetism, Science / Physics / Optics \\\\& Light},\\n}\\n\\n\",\"author_short\":[\"Benyoucef, M.\"],\"key\":\"benyoucef_photonic_2023\",\"id\":\"benyoucef_photonic_2023\",\"bibbaseid\":\"benyoucef-photonicquantumtechnologiesscienceandapplications-2023\",\"role\":\"author\",\"urls\":{},\"keyword\":[\"Science / Physics / Electromagnetism\",\"Science / Physics / Optics & Light\"],\"metadata\":{\"authorlinks\":{\"schröder, t\":\"https://www.physik.hu-berlin.de/en/iqp/publications\"}},\"html\":\"\"},{\"bibtype\":\"article\",\"type\":\"article\",\"title\":\"Spin–photon interface and spin-controlled photon switching in a nanobeam waveguide\",\"volume\":\"13\",\"copyright\":\"2018 The Author(s)\",\"issn\":\"1748-3395\",\"url\":\"https://www.nature.com/articles/s41565-018-0091-5\",\"doi\":\"10.1038/s41565-018-0091-5\",\"abstract\":\"The spin of an electron is a promising memory state and qubit. Connecting spin states that are spatially far apart will enable quantum nodes and quantum networks based on the electron spin. Towards this goal, an integrated spin–photon interface would be a major leap forward as it combines the memory capability of a single spin with the efficient transfer of information by photons. Here, we demonstrate such an efficient and optically programmable interface between the spin of an electron in a quantum dot and photons in a nanophotonic waveguide. The spin can be deterministically prepared in the ground state with a fidelity of up to 96%. Subsequently, the system is used to implement a single-spin photonic switch, in which the spin state of the electron directs the flow of photons through the waveguide. The spin–photon interface may enable on-chip photon–photon gates, single-photon transistors and the efficient generation of a photonic cluster state.\",\"language\":\"en\",\"number\":\"5\",\"urldate\":\"2022-08-03\",\"journal\":\"Nature Nanotechnology\",\"author\":[{\"propositions\":[],\"lastnames\":[\"Javadi\"],\"firstnames\":[\"Alisa\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Ding\"],\"firstnames\":[\"Dapeng\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Appel\"],\"firstnames\":[\"Martin\",\"Hayhurst\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Mahmoodian\"],\"firstnames\":[\"Sahand\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Löbl\"],\"firstnames\":[\"Matthias\",\"Christian\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Söllner\"],\"firstnames\":[\"Immo\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Schott\"],\"firstnames\":[\"Rüdiger\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Papon\"],\"firstnames\":[\"Camille\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Pregnolato\"],\"firstnames\":[\"Tommaso\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Stobbe\"],\"firstnames\":[\"Søren\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Midolo\"],\"firstnames\":[\"Leonardo\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Schröder\"],\"firstnames\":[\"Tim\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Wieck\"],\"firstnames\":[\"Andreas\",\"Dirk\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Ludwig\"],\"firstnames\":[\"Arne\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Warburton\"],\"firstnames\":[\"Richard\",\"John\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Lodahl\"],\"firstnames\":[\"Peter\"],\"suffixes\":[]}],\"month\":\"May\",\"year\":\"2018\",\"note\":\"Number: 5 Publisher: Nature Publishing Group\",\"keywords\":\"Nanophotonics and plasmonics, Quantum optics, Single photons and quantum effects\",\"pages\":\"398–403\",\"bibtex\":\"@article{javadi_spinphoton_2018,\\n\\ttitle = {Spin–photon interface and spin-controlled photon switching in a nanobeam waveguide},\\n\\tvolume = {13},\\n\\tcopyright = {2018 The Author(s)},\\n\\tissn = {1748-3395},\\n\\turl = {https://www.nature.com/articles/s41565-018-0091-5},\\n\\tdoi = {10.1038/s41565-018-0091-5},\\n\\tabstract = {The spin of an electron is a promising memory state and qubit. Connecting spin states that are spatially far apart will enable quantum nodes and quantum networks based on the electron spin. Towards this goal, an integrated spin–photon interface would be a major leap forward as it combines the memory capability of a single spin with the efficient transfer of information by photons. Here, we demonstrate such an efficient and optically programmable interface between the spin of an electron in a quantum dot and photons in a nanophotonic waveguide. The spin can be deterministically prepared in the ground state with a fidelity of up to 96\\\\%. Subsequently, the system is used to implement a single-spin photonic switch, in which the spin state of the electron directs the flow of photons through the waveguide. The spin–photon interface may enable on-chip photon–photon gates, single-photon transistors and the efficient generation of a photonic cluster state.},\\n\\tlanguage = {en},\\n\\tnumber = {5},\\n\\turldate = {2022-08-03},\\n\\tjournal = {Nature Nanotechnology},\\n\\tauthor = {Javadi, Alisa and Ding, Dapeng and Appel, Martin Hayhurst and Mahmoodian, Sahand and Löbl, Matthias Christian and Söllner, Immo and Schott, Rüdiger and Papon, Camille and Pregnolato, Tommaso and Stobbe, Søren and Midolo, Leonardo and Schröder, Tim and Wieck, Andreas Dirk and Ludwig, Arne and Warburton, Richard John and Lodahl, Peter},\\n\\tmonth = may,\\n\\tyear = {2018},\\n\\tnote = {Number: 5\\nPublisher: Nature Publishing Group},\\n\\tkeywords = {Nanophotonics and plasmonics, Quantum optics, Single photons and quantum effects},\\n\\tpages = {398--403},\\n}\\n\\n\",\"author_short\":[\"Javadi, A.\",\"Ding, D.\",\"Appel, M. H.\",\"Mahmoodian, S.\",\"Löbl, M. C.\",\"Söllner, I.\",\"Schott, R.\",\"Papon, C.\",\"Pregnolato, T.\",\"Stobbe, S.\",\"Midolo, L.\",\"Schröder, T.\",\"Wieck, A. D.\",\"Ludwig, A.\",\"Warburton, R. J.\",\"Lodahl, P.\"],\"key\":\"javadi_spinphoton_2018\",\"id\":\"javadi_spinphoton_2018\",\"bibbaseid\":\"javadi-ding-appel-mahmoodian-lbl-sllner-schott-papon-etal-spinphotoninterfaceandspincontrolledphotonswitchinginananobeamwaveguide-2018\",\"role\":\"author\",\"urls\":{\"Paper\":\"https://www.nature.com/articles/s41565-018-0091-5\"},\"keyword\":[\"Nanophotonics and plasmonics\",\"Quantum optics\",\"Single photons and quantum effects\"],\"metadata\":{\"authorlinks\":{\"schröder, t\":\"https://www.physik.hu-berlin.de/en/iqp/publications\"}},\"downloads\":3,\"html\":\"\"},{\"bibtype\":\"article\",\"type\":\"article\",\"title\":\"Efficient Extraction of Light from a Nitrogen-Vacancy Center in a Diamond Parabolic Reflector\",\"volume\":\"18\",\"issn\":\"1530-6984\",\"url\":\"https://doi.org/10.1021/acs.nanolett.7b04684\",\"doi\":\"10.1021/acs.nanolett.7b04684\",\"abstract\":\"Quantum emitters in solids are being developed for a range of quantum technologies, including quantum networks, computing, and sensing. However, a remaining challenge is the poor photon collection due to the high refractive index of most host materials. Here we overcome this limitation by introducing monolithic parabolic reflectors as an efficient geometry for broadband photon extraction from quantum emitter and experimentally demonstrate this device for the nitrogen-vacancy (NV) center in diamond. Simulations indicate a photon collection efficiency exceeding 75% across the visible spectrum and experimental devices, fabricated using a high-throughput gray scale lithography process, demonstrating a photon extraction efficiency of (41 ± 5)%. This device enables a raw experimental detection efficiency of (12 ± 1)% with fluorescence detection rates as high as (4.114 ± 0.003) × 106 counts per second (cps) from a single NV center. Enabled by our deterministic emitter localization and fabrication process, we find a high number of exceptional devices with an average count rate of (3.1 ± 0.9) × 106 cps.\",\"number\":\"5\",\"urldate\":\"2022-08-03\",\"journal\":\"Nano Letters\",\"author\":[{\"propositions\":[],\"lastnames\":[\"Wan\"],\"firstnames\":[\"Noel\",\"H.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Shields\"],\"firstnames\":[\"Brendan\",\"J.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Kim\"],\"firstnames\":[\"Donggyu\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Mouradian\"],\"firstnames\":[\"Sara\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Lienhard\"],\"firstnames\":[\"Benjamin\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Walsh\"],\"firstnames\":[\"Michael\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Bakhru\"],\"firstnames\":[\"Hassaram\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Schröder\"],\"firstnames\":[\"Tim\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Englund\"],\"firstnames\":[\"Dirk\"],\"suffixes\":[]}],\"month\":\"May\",\"year\":\"2018\",\"note\":\"Publisher: American Chemical Society\",\"pages\":\"2787–2793\",\"bibtex\":\"@article{wan_efficient_2018,\\n\\ttitle = {Efficient {Extraction} of {Light} from a {Nitrogen}-{Vacancy} {Center} in a {Diamond} {Parabolic} {Reflector}},\\n\\tvolume = {18},\\n\\tissn = {1530-6984},\\n\\turl = {https://doi.org/10.1021/acs.nanolett.7b04684},\\n\\tdoi = {10.1021/acs.nanolett.7b04684},\\n\\tabstract = {Quantum emitters in solids are being developed for a range of quantum technologies, including quantum networks, computing, and sensing. However, a remaining challenge is the poor photon collection due to the high refractive index of most host materials. Here we overcome this limitation by introducing monolithic parabolic reflectors as an efficient geometry for broadband photon extraction from quantum emitter and experimentally demonstrate this device for the nitrogen-vacancy (NV) center in diamond. Simulations indicate a photon collection efficiency exceeding 75\\\\% across the visible spectrum and experimental devices, fabricated using a high-throughput gray scale lithography process, demonstrating a photon extraction efficiency of (41 ± 5)\\\\%. This device enables a raw experimental detection efficiency of (12 ± 1)\\\\% with fluorescence detection rates as high as (4.114 ± 0.003) × 106 counts per second (cps) from a single NV center. Enabled by our deterministic emitter localization and fabrication process, we find a high number of exceptional devices with an average count rate of (3.1 ± 0.9) × 106 cps.},\\n\\tnumber = {5},\\n\\turldate = {2022-08-03},\\n\\tjournal = {Nano Letters},\\n\\tauthor = {Wan, Noel H. and Shields, Brendan J. and Kim, Donggyu and Mouradian, Sara and Lienhard, Benjamin and Walsh, Michael and Bakhru, Hassaram and Schröder, Tim and Englund, Dirk},\\n\\tmonth = may,\\n\\tyear = {2018},\\n\\tnote = {Publisher: American Chemical Society},\\n\\tpages = {2787--2793},\\n}\\n\\n\",\"author_short\":[\"Wan, N. H.\",\"Shields, B. J.\",\"Kim, D.\",\"Mouradian, S.\",\"Lienhard, B.\",\"Walsh, M.\",\"Bakhru, H.\",\"Schröder, T.\",\"Englund, D.\"],\"key\":\"wan_efficient_2018\",\"id\":\"wan_efficient_2018\",\"bibbaseid\":\"wan-shields-kim-mouradian-lienhard-walsh-bakhru-schrder-etal-efficientextractionoflightfromanitrogenvacancycenterinadiamondparabolicreflector-2018\",\"role\":\"author\",\"urls\":{\"Paper\":\"https://doi.org/10.1021/acs.nanolett.7b04684\"},\"metadata\":{\"authorlinks\":{\"schröder, t\":\"https://www.physik.hu-berlin.de/en/iqp/publications\"}},\"downloads\":2,\"html\":\"\"},{\"bibtype\":\"article\",\"type\":\"article\",\"title\":\"Bright nanowire single photon source based on SiV centers in diamond\",\"volume\":\"26\",\"copyright\":\"&#169; 2018 Optical Society of America\",\"issn\":\"1094-4087\",\"url\":\"https://opg.optica.org/oe/abstract.cfm?uri=oe-26-1-80\",\"doi\":\"10.1364/OE.26.000080\",\"abstract\":\"The practical implementation of many quantum technologies relies on the development of robust and bright single photon sources that operate at room temperature. The negatively charged silicon-vacancy (SiV&#x02212;) color center in diamond is a possible candidate for such a single photon source. However, due to the high refraction index mismatch to air, color centers in diamond typically exhibit low photon out-coupling. An additional shortcoming is due to the random localization of native defects in the diamond sample. Here we demonstrate deterministic implantation of Si ions with high conversion efficiency to single SiV&#x02212; centers, targeted to fabricated nanowires. The co-localization of single SiV&#x02212; centers with the nanostructures yields a ten times higher light coupling efficiency than for single SiV&#x02212; centers in bulk diamond. This enhanced photon out-coupling, together with the intrinsic scalability of the SiV&#x02212; creation method, enables a new class of devices for integrated photonics and quantum science.\",\"language\":\"EN\",\"number\":\"1\",\"urldate\":\"2022-08-03\",\"journal\":\"Optics Express\",\"author\":[{\"propositions\":[],\"lastnames\":[\"Marseglia\"],\"firstnames\":[\"L.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Saha\"],\"firstnames\":[\"K.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Ajoy\"],\"firstnames\":[\"A.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Schröder\"],\"firstnames\":[\"T.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Englund\"],\"firstnames\":[\"D.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Jelezko\"],\"firstnames\":[\"F.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Walsworth\"],\"firstnames\":[\"R.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Pacheco\"],\"firstnames\":[\"J.\",\"L.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Perry\"],\"firstnames\":[\"D.\",\"L.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Bielejec\"],\"firstnames\":[\"E.\",\"S.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Cappellaro\"],\"firstnames\":[\"P.\"],\"suffixes\":[]}],\"month\":\"January\",\"year\":\"2018\",\"note\":\"Publisher: Optica Publishing Group\",\"pages\":\"80–89\",\"bibtex\":\"@article{marseglia_bright_2018,\\n\\ttitle = {Bright nanowire single photon source based on {SiV} centers in diamond},\\n\\tvolume = {26},\\n\\tcopyright = {\\\\&\\\\#169; 2018 Optical Society of America},\\n\\tissn = {1094-4087},\\n\\turl = {https://opg.optica.org/oe/abstract.cfm?uri=oe-26-1-80},\\n\\tdoi = {10.1364/OE.26.000080},\\n\\tabstract = {The practical implementation of many quantum technologies relies on the development of robust and bright single photon sources that operate at room temperature. The negatively charged silicon-vacancy (SiV\\\\&\\\\#x02212;) color center in diamond is a possible candidate for such a single photon source. However, due to the high refraction index mismatch to air, color centers in diamond typically exhibit low photon out-coupling. An additional shortcoming is due to the random localization of native defects in the diamond sample. Here we demonstrate deterministic implantation of Si ions with high conversion efficiency to single SiV\\\\&\\\\#x02212; centers, targeted to fabricated nanowires. The co-localization of single SiV\\\\&\\\\#x02212; centers with the nanostructures yields a ten times higher light coupling efficiency than for single SiV\\\\&\\\\#x02212; centers in bulk diamond. This enhanced photon out-coupling, together with the intrinsic scalability of the SiV\\\\&\\\\#x02212; creation method, enables a new class of devices for integrated photonics and quantum science.},\\n\\tlanguage = {EN},\\n\\tnumber = {1},\\n\\turldate = {2022-08-03},\\n\\tjournal = {Optics Express},\\n\\tauthor = {Marseglia, L. and Saha, K. and Ajoy, A. and Schröder, T. and Englund, D. and Jelezko, F. and Walsworth, R. and Pacheco, J. L. and Perry, D. L. and Bielejec, E. S. and Cappellaro, P.},\\n\\tmonth = jan,\\n\\tyear = {2018},\\n\\tnote = {Publisher: Optica Publishing Group},\\n\\tpages = {80--89},\\n}\\n\\n\",\"author_short\":[\"Marseglia, L.\",\"Saha, K.\",\"Ajoy, A.\",\"Schröder, T.\",\"Englund, D.\",\"Jelezko, F.\",\"Walsworth, R.\",\"Pacheco, J. L.\",\"Perry, D. L.\",\"Bielejec, E. S.\",\"Cappellaro, P.\"],\"key\":\"marseglia_bright_2018\",\"id\":\"marseglia_bright_2018\",\"bibbaseid\":\"marseglia-saha-ajoy-schrder-englund-jelezko-walsworth-pacheco-etal-brightnanowiresinglephotonsourcebasedonsivcentersindiamond-2018\",\"role\":\"author\",\"urls\":{\"Paper\":\"https://opg.optica.org/oe/abstract.cfm?uri=oe-26-1-80\"},\"metadata\":{\"authorlinks\":{\"schröder, t\":\"https://www.physik.hu-berlin.de/en/iqp/publications\"}},\"downloads\":5,\"html\":\"\"},{\"bibtype\":\"article\",\"type\":\"article\",\"title\":\"Individual control and readout of qubits in a sub-diffraction volume\",\"volume\":\"5\",\"copyright\":\"2019 The Author(s)\",\"issn\":\"2056-6387\",\"url\":\"https://www.nature.com/articles/s41534-019-0154-y\",\"doi\":\"10.1038/s41534-019-0154-y\",\"abstract\":\"Medium-scale ensembles of coupled qubits offer a platform for near-term quantum technologies as well as studies of many-body physics. A central challenge for coherent control of such systems is the ability to measure individual quantum states without disturbing nearby qubits. Here, we demonstrate the measurement of individual qubit states in a sub-diffraction cluster by selectively exciting spectrally distinguishable nitrogen vacancy centers. We perform super-resolution localization of single centers with nanometer spatial resolution, as well as individual control and readout of spin populations. These measurements indicate a readout-induced crosstalk on non-addressed qubits below 4 × 10−2. This approach opens the door to high-speed control and measurement of qubit registers in mesoscopic spin clusters, with applications ranging from entanglement-enhanced sensors to error-corrected qubit registers to multiplexed quantum repeater nodes.\",\"language\":\"en\",\"number\":\"1\",\"urldate\":\"2022-08-03\",\"journal\":\"npj Quantum Information\",\"author\":[{\"propositions\":[],\"lastnames\":[\"Bersin\"],\"firstnames\":[\"Eric\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Walsh\"],\"firstnames\":[\"Michael\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Mouradian\"],\"firstnames\":[\"Sara\",\"L.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Trusheim\"],\"firstnames\":[\"Matthew\",\"E.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Schröder\"],\"firstnames\":[\"Tim\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Englund\"],\"firstnames\":[\"Dirk\"],\"suffixes\":[]}],\"month\":\"May\",\"year\":\"2019\",\"note\":\"Number: 1 Publisher: Nature Publishing Group\",\"keywords\":\"Atom optics, Quantum information, Quantum optics, Single photons and quantum effects, Sub-wavelength optics\",\"pages\":\"1–6\",\"bibtex\":\"@article{bersin_individual_2019,\\n\\ttitle = {Individual control and readout of qubits in a sub-diffraction volume},\\n\\tvolume = {5},\\n\\tcopyright = {2019 The Author(s)},\\n\\tissn = {2056-6387},\\n\\turl = {https://www.nature.com/articles/s41534-019-0154-y},\\n\\tdoi = {10.1038/s41534-019-0154-y},\\n\\tabstract = {Medium-scale ensembles of coupled qubits offer a platform for near-term quantum technologies as well as studies of many-body physics. A central challenge for coherent control of such systems is the ability to measure individual quantum states without disturbing nearby qubits. Here, we demonstrate the measurement of individual qubit states in a sub-diffraction cluster by selectively exciting spectrally distinguishable nitrogen vacancy centers. We perform super-resolution localization of single centers with nanometer spatial resolution, as well as individual control and readout of spin populations. These measurements indicate a readout-induced crosstalk on non-addressed qubits below 4 × 10−2. This approach opens the door to high-speed control and measurement of qubit registers in mesoscopic spin clusters, with applications ranging from entanglement-enhanced sensors to error-corrected qubit registers to multiplexed quantum repeater nodes.},\\n\\tlanguage = {en},\\n\\tnumber = {1},\\n\\turldate = {2022-08-03},\\n\\tjournal = {npj Quantum Information},\\n\\tauthor = {Bersin, Eric and Walsh, Michael and Mouradian, Sara L. and Trusheim, Matthew E. and Schröder, Tim and Englund, Dirk},\\n\\tmonth = may,\\n\\tyear = {2019},\\n\\tnote = {Number: 1\\nPublisher: Nature Publishing Group},\\n\\tkeywords = {Atom optics, Quantum information, Quantum optics, Single photons and quantum effects, Sub-wavelength optics},\\n\\tpages = {1--6},\\n}\\n\\n\",\"author_short\":[\"Bersin, E.\",\"Walsh, M.\",\"Mouradian, S. L.\",\"Trusheim, M. E.\",\"Schröder, T.\",\"Englund, D.\"],\"key\":\"bersin_individual_2019\",\"id\":\"bersin_individual_2019\",\"bibbaseid\":\"bersin-walsh-mouradian-trusheim-schrder-englund-individualcontrolandreadoutofqubitsinasubdiffractionvolume-2019\",\"role\":\"author\",\"urls\":{\"Paper\":\"https://www.nature.com/articles/s41534-019-0154-y\"},\"keyword\":[\"Atom optics\",\"Quantum information\",\"Quantum optics\",\"Single photons and quantum effects\",\"Sub-wavelength optics\"],\"metadata\":{\"authorlinks\":{\"schröder, t\":\"https://www.physik.hu-berlin.de/en/iqp/publications\"}},\"downloads\":4,\"html\":\"\"},{\"bibtype\":\"article\",\"type\":\"article\",\"title\":\"Coherent Optical Control of a Quantum-Dot Spin-Qubit in a Waveguide-Based Spin-Photon Interface\",\"volume\":\"11\",\"url\":\"https://link.aps.org/doi/10.1103/PhysRevApplied.11.031002\",\"doi\":\"10.1103/PhysRevApplied.11.031002\",\"abstract\":\"Waveguide-based spin-photon interfaces on the GaAs platform have emerged as a promising system for a variety of quantum information applications directly integrated into planar photonic circuits. The coherent control of spin states in a quantum dot can be achieved by applying circularly polarized laser pulses that may be coupled into the planar waveguide vertically through radiation modes. However, proper control of the laser polarization is challenging since the polarization is modified through the transformation from the far field to the exact position of the quantum dot in the nanostructure. Here, we demonstrate polarization-controlled excitation of a quantum-dot electron spin and use that to perform coherent control in a Ramsey interferometry experiment. The Ramsey interference reveals an inhomogeneous dephasing time of 2.2±0.1 ns, which is comparable to the values so far only obtained in bulk media. We analyze the experimental limitations in spin initialization fidelity and Ramsey contrast and identify the underlying mechanisms.\",\"number\":\"3\",\"urldate\":\"2022-08-03\",\"journal\":\"Physical Review Applied\",\"author\":[{\"propositions\":[],\"lastnames\":[\"Ding\"],\"firstnames\":[\"Dapeng\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Appel\"],\"firstnames\":[\"Martin\",\"Hayhurst\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Javadi\"],\"firstnames\":[\"Alisa\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Zhou\"],\"firstnames\":[\"Xiaoyan\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Löbl\"],\"firstnames\":[\"Matthias\",\"Christian\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Söllner\"],\"firstnames\":[\"Immo\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Schott\"],\"firstnames\":[\"Rüdiger\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Papon\"],\"firstnames\":[\"Camille\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Pregnolato\"],\"firstnames\":[\"Tommaso\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Midolo\"],\"firstnames\":[\"Leonardo\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Wieck\"],\"firstnames\":[\"Andreas\",\"Dirk\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Ludwig\"],\"firstnames\":[\"Arne\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Warburton\"],\"firstnames\":[\"Richard\",\"John\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Schröder\"],\"firstnames\":[\"Tim\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Lodahl\"],\"firstnames\":[\"Peter\"],\"suffixes\":[]}],\"month\":\"March\",\"year\":\"2019\",\"note\":\"Publisher: American Physical Society\",\"pages\":\"031002\",\"bibtex\":\"@article{ding_coherent_2019,\\n\\ttitle = {Coherent {Optical} {Control} of a {Quantum}-{Dot} {Spin}-{Qubit} in a {Waveguide}-{Based} {Spin}-{Photon} {Interface}},\\n\\tvolume = {11},\\n\\turl = {https://link.aps.org/doi/10.1103/PhysRevApplied.11.031002},\\n\\tdoi = {10.1103/PhysRevApplied.11.031002},\\n\\tabstract = {Waveguide-based spin-photon interfaces on the GaAs platform have emerged as a promising system for a variety of quantum information applications directly integrated into planar photonic circuits. The coherent control of spin states in a quantum dot can be achieved by applying circularly polarized laser pulses that may be coupled into the planar waveguide vertically through radiation modes. However, proper control of the laser polarization is challenging since the polarization is modified through the transformation from the far field to the exact position of the quantum dot in the nanostructure. Here, we demonstrate polarization-controlled excitation of a quantum-dot electron spin and use that to perform coherent control in a Ramsey interferometry experiment. The Ramsey interference reveals an inhomogeneous dephasing time of 2.2±0.1 ns, which is comparable to the values so far only obtained in bulk media. We analyze the experimental limitations in spin initialization fidelity and Ramsey contrast and identify the underlying mechanisms.},\\n\\tnumber = {3},\\n\\turldate = {2022-08-03},\\n\\tjournal = {Physical Review Applied},\\n\\tauthor = {Ding, Dapeng and Appel, Martin Hayhurst and Javadi, Alisa and Zhou, Xiaoyan and Löbl, Matthias Christian and Söllner, Immo and Schott, Rüdiger and Papon, Camille and Pregnolato, Tommaso and Midolo, Leonardo and Wieck, Andreas Dirk and Ludwig, Arne and Warburton, Richard John and Schröder, Tim and Lodahl, Peter},\\n\\tmonth = mar,\\n\\tyear = {2019},\\n\\tnote = {Publisher: American Physical Society},\\n\\tpages = {031002},\\n}\\n\\n\",\"author_short\":[\"Ding, D.\",\"Appel, M. H.\",\"Javadi, A.\",\"Zhou, X.\",\"Löbl, M. C.\",\"Söllner, I.\",\"Schott, R.\",\"Papon, C.\",\"Pregnolato, T.\",\"Midolo, L.\",\"Wieck, A. D.\",\"Ludwig, A.\",\"Warburton, R. J.\",\"Schröder, T.\",\"Lodahl, P.\"],\"key\":\"ding_coherent_2019\",\"id\":\"ding_coherent_2019\",\"bibbaseid\":\"ding-appel-javadi-zhou-lbl-sllner-schott-papon-etal-coherentopticalcontrolofaquantumdotspinqubitinawaveguidebasedspinphotoninterface-2019\",\"role\":\"author\",\"urls\":{\"Paper\":\"https://link.aps.org/doi/10.1103/PhysRevApplied.11.031002\"},\"metadata\":{\"authorlinks\":{\"schröder, t\":\"https://www.physik.hu-berlin.de/en/iqp/publications\"}},\"downloads\":2,\"html\":\"\"},{\"bibtype\":\"article\",\"type\":\"article\",\"title\":\"One-Way Quantum Repeater Based on Near-Deterministic Photon-Emitter Interfaces\",\"volume\":\"10\",\"url\":\"https://link.aps.org/doi/10.1103/PhysRevX.10.021071\",\"doi\":\"10.1103/PhysRevX.10.021071\",\"abstract\":\"We propose a novel one-way quantum repeater architecture based on photonic tree-cluster states. Encoding a qubit in a photonic tree cluster protects the information from transmission loss and enables long-range quantum communication through a chain of repeater stations. As opposed to conventional approaches that are limited by the two-way communication time, the overall transmission rate of the current quantum repeater protocol is determined by the local processing time enabling very high communication rates. We further show that such a repeater can be constructed with as little as two stationary qubits and one quantum emitter per repeater station, which significantly increases the experimental feasibility. We discuss potential implementations with diamond defect centers and semiconductor quantum dots efficiently coupled to photonic nanostructures and outline how such systems may be integrated into repeater stations.\",\"number\":\"2\",\"urldate\":\"2022-08-03\",\"journal\":\"Physical Review X\",\"author\":[{\"propositions\":[],\"lastnames\":[\"Borregaard\"],\"firstnames\":[\"Johannes\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Pichler\"],\"firstnames\":[\"Hannes\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Schröder\"],\"firstnames\":[\"Tim\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Lukin\"],\"firstnames\":[\"Mikhail\",\"D.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Lodahl\"],\"firstnames\":[\"Peter\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Sørensen\"],\"firstnames\":[\"Anders\",\"S.\"],\"suffixes\":[]}],\"month\":\"June\",\"year\":\"2020\",\"note\":\"Publisher: American Physical Society\",\"pages\":\"021071\",\"bibtex\":\"@article{borregaard_one-way_2020,\\n\\ttitle = {One-{Way} {Quantum} {Repeater} {Based} on {Near}-{Deterministic} {Photon}-{Emitter} {Interfaces}},\\n\\tvolume = {10},\\n\\turl = {https://link.aps.org/doi/10.1103/PhysRevX.10.021071},\\n\\tdoi = {10.1103/PhysRevX.10.021071},\\n\\tabstract = {We propose a novel one-way quantum repeater architecture based on photonic tree-cluster states. Encoding a qubit in a photonic tree cluster protects the information from transmission loss and enables long-range quantum communication through a chain of repeater stations. As opposed to conventional approaches that are limited by the two-way communication time, the overall transmission rate of the current quantum repeater protocol is determined by the local processing time enabling very high communication rates. We further show that such a repeater can be constructed with as little as two stationary qubits and one quantum emitter per repeater station, which significantly increases the experimental feasibility. We discuss potential implementations with diamond defect centers and semiconductor quantum dots efficiently coupled to photonic nanostructures and outline how such systems may be integrated into repeater stations.},\\n\\tnumber = {2},\\n\\turldate = {2022-08-03},\\n\\tjournal = {Physical Review X},\\n\\tauthor = {Borregaard, Johannes and Pichler, Hannes and Schröder, Tim and Lukin, Mikhail D. and Lodahl, Peter and Sørensen, Anders S.},\\n\\tmonth = jun,\\n\\tyear = {2020},\\n\\tnote = {Publisher: American Physical Society},\\n\\tpages = {021071},\\n}\\n\\n\",\"author_short\":[\"Borregaard, J.\",\"Pichler, H.\",\"Schröder, T.\",\"Lukin, M. D.\",\"Lodahl, P.\",\"Sørensen, A. S.\"],\"key\":\"borregaard_one-way_2020\",\"id\":\"borregaard_one-way_2020\",\"bibbaseid\":\"borregaard-pichler-schrder-lukin-lodahl-srensen-onewayquantumrepeaterbasedonneardeterministicphotonemitterinterfaces-2020\",\"role\":\"author\",\"urls\":{\"Paper\":\"https://link.aps.org/doi/10.1103/PhysRevX.10.021071\"},\"metadata\":{\"authorlinks\":{\"schröder, t\":\"https://www.physik.hu-berlin.de/en/iqp/publications\"}},\"downloads\":4,\"html\":\"\"},{\"bibtype\":\"article\",\"type\":\"article\",\"title\":\"Deterministic positioning of nanophotonic waveguides around single self-assembled quantum dots\",\"volume\":\"5\",\"url\":\"https://aip.scitation.org/doi/full/10.1063/1.5117888\",\"doi\":\"10.1063/1.5117888\",\"abstract\":\"The capability to embed self-assembled quantum dots (QDs) at predefined positions in nanophotonic structures is key to the development of complex quantum-photonic architectures. Here, we demonstrate that QDs can be deterministically positioned in nanophotonic waveguides by pre-locating QDs relative to a global reference frame using micro-photoluminescence (μPL) spectroscopy. After nanofabrication, μPL images reveal misalignments between the central axis of the waveguide and the embedded QD of only (9 ± 46) nm and (1 ± 33) nm for QDs embedded in undoped and doped membranes, respectively. A priori knowledge of the QD positions allows us to study the spectral changes introduced by nanofabrication. We record average spectral shifts ranging from 0.1 nm to 1.1 nm, indicating that the fabrication-induced shifts can generally be compensated by electrical or thermal tuning of the QDs. Finally, we quantify the effects of the nanofabrication on the polarizability, the permanent dipole moment, and the emission frequency at vanishing electric field of different QD charge states, finding that these changes are constant down to QD-surface separations of only 70 nm. Consequently, our approach deterministically integrates QDs into nanophotonic waveguides whose light-fields contain nanoscale structure and whose group index varies at the nanometer level.\",\"number\":\"8\",\"urldate\":\"2022-08-03\",\"journal\":\"APL Photonics\",\"author\":[{\"propositions\":[],\"lastnames\":[\"Pregnolato\"],\"firstnames\":[\"T.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Chu\"],\"firstnames\":[\"X.-L.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Schröder\"],\"firstnames\":[\"T.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Schott\"],\"firstnames\":[\"R.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Wieck\"],\"firstnames\":[\"A.\",\"D.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Ludwig\"],\"firstnames\":[\"A.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Lodahl\"],\"firstnames\":[\"P.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Rotenberg\"],\"firstnames\":[\"N.\"],\"suffixes\":[]}],\"month\":\"August\",\"year\":\"2020\",\"note\":\"Publisher: American Institute of Physics\",\"pages\":\"086101\",\"bibtex\":\"@article{pregnolato_deterministic_2020,\\n\\ttitle = {Deterministic positioning of nanophotonic waveguides around single self-assembled quantum dots},\\n\\tvolume = {5},\\n\\turl = {https://aip.scitation.org/doi/full/10.1063/1.5117888},\\n\\tdoi = {10.1063/1.5117888},\\n\\tabstract = {The capability to embed self-assembled quantum dots (QDs) at predefined positions in nanophotonic structures is key to the development of complex quantum-photonic architectures. Here, we demonstrate that QDs can be deterministically positioned in nanophotonic waveguides by pre-locating QDs relative to a global reference frame using micro-photoluminescence (μPL) spectroscopy. After nanofabrication, μPL images reveal misalignments between the central axis of the waveguide and the embedded QD of only (9 ± 46) nm and (1 ± 33) nm for QDs embedded in undoped and doped membranes, respectively. A priori knowledge of the QD positions allows us to study the spectral changes introduced by nanofabrication. We record average spectral shifts ranging from 0.1 nm to 1.1 nm, indicating that the fabrication-induced shifts can generally be compensated by electrical or thermal tuning of the QDs. Finally, we quantify the effects of the nanofabrication on the polarizability, the permanent dipole moment, and the emission frequency at vanishing electric field of different QD charge states, finding that these changes are constant down to QD-surface separations of only 70 nm. Consequently, our approach deterministically integrates QDs into nanophotonic waveguides whose light-fields contain nanoscale structure and whose group index varies at the nanometer level.},\\n\\tnumber = {8},\\n\\turldate = {2022-08-03},\\n\\tjournal = {APL Photonics},\\n\\tauthor = {Pregnolato, T. and Chu, X.-L. and Schröder, T. and Schott, R. and Wieck, A. D. and Ludwig, A. and Lodahl, P. and Rotenberg, N.},\\n\\tmonth = aug,\\n\\tyear = {2020},\\n\\tnote = {Publisher: American Institute of Physics},\\n\\tpages = {086101},\\n}\\n\\n\",\"author_short\":[\"Pregnolato, T.\",\"Chu, X.\",\"Schröder, T.\",\"Schott, R.\",\"Wieck, A. D.\",\"Ludwig, A.\",\"Lodahl, P.\",\"Rotenberg, N.\"],\"key\":\"pregnolato_deterministic_2020\",\"id\":\"pregnolato_deterministic_2020\",\"bibbaseid\":\"pregnolato-chu-schrder-schott-wieck-ludwig-lodahl-rotenberg-deterministicpositioningofnanophotonicwaveguidesaroundsingleselfassembledquantumdots-2020\",\"role\":\"author\",\"urls\":{\"Paper\":\"https://aip.scitation.org/doi/full/10.1063/1.5117888\"},\"metadata\":{\"authorlinks\":{\"schröder, t\":\"https://www.physik.hu-berlin.de/en/iqp/publications\"}},\"downloads\":1,\"html\":\"\"},{\"bibtype\":\"article\",\"type\":\"article\",\"title\":\"Using silicon-vacancy centers in diamond to probe the full strain tensor\",\"volume\":\"130\",\"issn\":\"0021-8979\",\"url\":\"https://aip.scitation.org/doi/full/10.1063/5.0052613\",\"doi\":\"10.1063/5.0052613\",\"abstract\":\"An ensemble of silicon vacancy ( SiV − SiV− ) centers in diamond is probed using two-pulse correlation spectroscopy and multidimensional coherent spectroscopy. Two main distinct families of SiV − SiV− centers are identified, and these families are paired with two orientation groups by comparing spectra from different linear polarizations of the incident laser. By tracking the peak centers in the measured spectra, the full diamond strain tensor is calculated local to the laser spot. Measurements are made at multiple points on the sample surface, and variations in the strain tensor are observed.\",\"number\":\"2\",\"urldate\":\"2022-08-03\",\"journal\":\"Journal of Applied Physics\",\"author\":[{\"propositions\":[],\"lastnames\":[\"Bates\"],\"firstnames\":[\"Kelsey\",\"M.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Day\"],\"firstnames\":[\"Matthew\",\"W.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Smallwood\"],\"firstnames\":[\"Christopher\",\"L.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Owen\"],\"firstnames\":[\"Rachel\",\"C.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Schröder\"],\"firstnames\":[\"Tim\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Bielejec\"],\"firstnames\":[\"Edward\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Ulbricht\"],\"firstnames\":[\"Ronald\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Cundiff\"],\"firstnames\":[\"Steven\",\"T.\"],\"suffixes\":[]}],\"month\":\"July\",\"year\":\"2021\",\"note\":\"Publisher: American Institute of Physics\",\"pages\":\"024301\",\"bibtex\":\"@article{bates_using_2021,\\n\\ttitle = {Using silicon-vacancy centers in diamond to probe the full strain tensor},\\n\\tvolume = {130},\\n\\tissn = {0021-8979},\\n\\turl = {https://aip.scitation.org/doi/full/10.1063/5.0052613},\\n\\tdoi = {10.1063/5.0052613},\\n\\tabstract = {An ensemble of silicon vacancy (\\nSiV\\n−\\nSiV−\\n) centers in diamond is probed using two-pulse correlation spectroscopy and multidimensional coherent spectroscopy. Two main distinct families of \\nSiV\\n−\\nSiV−\\n centers are identified, and these families are paired with two orientation groups by comparing spectra from different linear polarizations of the incident laser. By tracking the peak centers in the measured spectra, the full diamond strain tensor is calculated local to the laser spot. Measurements are made at multiple points on the sample surface, and variations in the strain tensor are observed.},\\n\\tnumber = {2},\\n\\turldate = {2022-08-03},\\n\\tjournal = {Journal of Applied Physics},\\n\\tauthor = {Bates, Kelsey M. and Day, Matthew W. and Smallwood, Christopher L. and Owen, Rachel C. and Schröder, Tim and Bielejec, Edward and Ulbricht, Ronald and Cundiff, Steven T.},\\n\\tmonth = jul,\\n\\tyear = {2021},\\n\\tnote = {Publisher: American Institute of Physics},\\n\\tpages = {024301},\\n}\\n\\n\",\"author_short\":[\"Bates, K. M.\",\"Day, M. W.\",\"Smallwood, C. L.\",\"Owen, R. C.\",\"Schröder, T.\",\"Bielejec, E.\",\"Ulbricht, R.\",\"Cundiff, S. T.\"],\"key\":\"bates_using_2021\",\"id\":\"bates_using_2021\",\"bibbaseid\":\"bates-day-smallwood-owen-schrder-bielejec-ulbricht-cundiff-usingsiliconvacancycentersindiamondtoprobethefullstraintensor-2021\",\"role\":\"author\",\"urls\":{\"Paper\":\"https://aip.scitation.org/doi/full/10.1063/5.0052613\"},\"metadata\":{\"authorlinks\":{\"schröder, t\":\"https://www.physik.hu-berlin.de/en/iqp/publications\"}},\"downloads\":5,\"html\":\"\"},{\"bibtype\":\"article\",\"type\":\"article\",\"title\":\"Roadmap on quantum nanotechnologies\",\"volume\":\"32\",\"issn\":\"0957-4484\",\"url\":\"https://doi.org/10.1088/1361-6528/abb333\",\"doi\":\"10.1088/1361-6528/abb333\",\"abstract\":\"Quantum phenomena are typically observable at length and time scales smaller than those of our everyday experience, often involving individual particles or excitations. The past few decades have seen a revolution in the ability to structure matter at the nanoscale, and experiments at the single particle level have become commonplace. This has opened wide new avenues for exploring and harnessing quantum mechanical effects in condensed matter. These quantum phenomena, in turn, have the potential to revolutionize the way we communicate, compute and probe the nanoscale world. Here, we review developments in key areas of quantum research in light of the nanotechnologies that enable them, with a view to what the future holds. Materials and devices with nanoscale features are used for quantum metrology and sensing, as building blocks for quantum computing, and as sources and detectors for quantum communication. They enable explorations of quantum behaviour and unconventional states in nano- and opto-mechanical systems, low-dimensional systems, molecular devices, nano-plasmonics, quantum electrodynamics, scanning tunnelling microscopy, and more. This rapidly expanding intersection of nanotechnology and quantum science/technology is mutually beneficial to both fields, laying claim to some of the most exciting scientific leaps of the last decade, with more on the horizon.\",\"language\":\"en\",\"number\":\"16\",\"urldate\":\"2022-08-03\",\"journal\":\"Nanotechnology\",\"author\":[{\"propositions\":[],\"lastnames\":[\"Laucht\"],\"firstnames\":[\"Arne\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Hohls\"],\"firstnames\":[\"Frank\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Ubbelohde\"],\"firstnames\":[\"Niels\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Gonzalez-Zalba\"],\"firstnames\":[\"M.\",\"Fernando\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Reilly\"],\"firstnames\":[\"David\",\"J.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Stobbe\"],\"firstnames\":[\"Søren\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Schröder\"],\"firstnames\":[\"Tim\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Scarlino\"],\"firstnames\":[\"Pasquale\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Koski\"],\"firstnames\":[\"Jonne\",\"V.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Dzurak\"],\"firstnames\":[\"Andrew\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Yang\"],\"firstnames\":[\"Chih-Hwan\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Yoneda\"],\"firstnames\":[\"Jun\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Kuemmeth\"],\"firstnames\":[\"Ferdinand\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Bluhm\"],\"firstnames\":[\"Hendrik\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Pla\"],\"firstnames\":[\"Jarryd\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Hill\"],\"firstnames\":[\"Charles\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Salfi\"],\"firstnames\":[\"Joe\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Oiwa\"],\"firstnames\":[\"Akira\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Muhonen\"],\"firstnames\":[\"Juha\",\"T.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Verhagen\"],\"firstnames\":[\"Ewold\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"LaHaye\"],\"firstnames\":[\"M.\",\"D.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Kim\"],\"firstnames\":[\"Hyun\",\"Ho\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Tsen\"],\"firstnames\":[\"Adam\",\"W.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Culcer\"],\"firstnames\":[\"Dimitrie\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Geresdi\"],\"firstnames\":[\"Attila\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Mol\"],\"firstnames\":[\"Jan\",\"A.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Mohan\"],\"firstnames\":[\"Varun\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Jain\"],\"firstnames\":[\"Prashant\",\"K.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Baugh\"],\"firstnames\":[\"Jonathan\"],\"suffixes\":[]}],\"month\":\"February\",\"year\":\"2021\",\"note\":\"Publisher: IOP Publishing\",\"pages\":\"162003\",\"bibtex\":\"@article{laucht_roadmap_2021,\\n\\ttitle = {Roadmap on quantum nanotechnologies},\\n\\tvolume = {32},\\n\\tissn = {0957-4484},\\n\\turl = {https://doi.org/10.1088/1361-6528/abb333},\\n\\tdoi = {10.1088/1361-6528/abb333},\\n\\tabstract = {Quantum phenomena are typically observable at length and time scales smaller than those of our everyday experience, often involving individual particles or excitations. The past few decades have seen a revolution in the ability to structure matter at the nanoscale, and experiments at the single particle level have become commonplace. This has opened wide new avenues for exploring and harnessing quantum mechanical effects in condensed matter. These quantum phenomena, in turn, have the potential to revolutionize the way we communicate, compute and probe the nanoscale world. Here, we review developments in key areas of quantum research in light of the nanotechnologies that enable them, with a view to what the future holds. Materials and devices with nanoscale features are used for quantum metrology and sensing, as building blocks for quantum computing, and as sources and detectors for quantum communication. They enable explorations of quantum behaviour and unconventional states in nano- and opto-mechanical systems, low-dimensional systems, molecular devices, nano-plasmonics, quantum electrodynamics, scanning tunnelling microscopy, and more. This rapidly expanding intersection of nanotechnology and quantum science/technology is mutually beneficial to both fields, laying claim to some of the most exciting scientific leaps of the last decade, with more on the horizon.},\\n\\tlanguage = {en},\\n\\tnumber = {16},\\n\\turldate = {2022-08-03},\\n\\tjournal = {Nanotechnology},\\n\\tauthor = {Laucht, Arne and Hohls, Frank and Ubbelohde, Niels and Gonzalez-Zalba, M. Fernando and Reilly, David J. and Stobbe, Søren and Schröder, Tim and Scarlino, Pasquale and Koski, Jonne V. and Dzurak, Andrew and Yang, Chih-Hwan and Yoneda, Jun and Kuemmeth, Ferdinand and Bluhm, Hendrik and Pla, Jarryd and Hill, Charles and Salfi, Joe and Oiwa, Akira and Muhonen, Juha T. and Verhagen, Ewold and LaHaye, M. D. and Kim, Hyun Ho and Tsen, Adam W. and Culcer, Dimitrie and Geresdi, Attila and Mol, Jan A. and Mohan, Varun and Jain, Prashant K. and Baugh, Jonathan},\\n\\tmonth = feb,\\n\\tyear = {2021},\\n\\tnote = {Publisher: IOP Publishing},\\n\\tpages = {162003},\\n}\\n\\n\",\"author_short\":[\"Laucht, A.\",\"Hohls, F.\",\"Ubbelohde, N.\",\"Gonzalez-Zalba, M. F.\",\"Reilly, D. J.\",\"Stobbe, S.\",\"Schröder, T.\",\"Scarlino, P.\",\"Koski, J. V.\",\"Dzurak, A.\",\"Yang, C.\",\"Yoneda, J.\",\"Kuemmeth, F.\",\"Bluhm, H.\",\"Pla, J.\",\"Hill, C.\",\"Salfi, J.\",\"Oiwa, A.\",\"Muhonen, J. T.\",\"Verhagen, E.\",\"LaHaye, M. D.\",\"Kim, H. H.\",\"Tsen, A. W.\",\"Culcer, D.\",\"Geresdi, A.\",\"Mol, J. A.\",\"Mohan, V.\",\"Jain, P. K.\",\"Baugh, J.\"],\"key\":\"laucht_roadmap_2021\",\"id\":\"laucht_roadmap_2021\",\"bibbaseid\":\"laucht-hohls-ubbelohde-gonzalezzalba-reilly-stobbe-schrder-scarlino-etal-roadmaponquantumnanotechnologies-2021\",\"role\":\"author\",\"urls\":{\"Paper\":\"https://doi.org/10.1088/1361-6528/abb333\"},\"metadata\":{\"authorlinks\":{\"schröder, t\":\"https://www.physik.hu-berlin.de/en/iqp/publications\"}},\"downloads\":11,\"html\":\"\"},{\"bibtype\":\"article\",\"type\":\"article\",\"title\":\"Optically Coherent Nitrogen-Vacancy Defect Centers in Diamond Nanostructures\",\"volume\":\"13\",\"url\":\"https://link.aps.org/doi/10.1103/PhysRevX.13.011042\",\"doi\":\"10.1103/PhysRevX.13.011042\",\"abstract\":\"Optically active solid-state spin defects have the potential to become a versatile resource for quantum information processing applications. Nitrogen-vacancy defect centers (NV) in diamond act as quantum memories and can be interfaced with coherent photons as demonstrated in entanglement protocols. However, particularly in diamond nanostructures, the effect of spectral diffusion leads to optical decoherence hindering entanglement generation. In this work, we present strategies to significantly reduce the electric noise in diamond nanostructures. We demonstrate single NVs in nanopillars exhibiting a lifetime-limited linewidth on a timescale of one second and long-term spectral stability with an inhomogeneous linewidth as low as 150 MHz over three minutes. Excitation power and energy-dependent measurements in combination with nanoscopic Monte Carlo simulations contribute to a better understanding of the impact of bulk and surface defects on the NV’s spectral properties. Finally, we propose an entanglement protocol for nanostructure-coupled NVs providing entanglement generation rates up to hundreds of kHz.\",\"number\":\"1\",\"urldate\":\"2023-04-17\",\"journal\":\"Physical Review X\",\"author\":[{\"propositions\":[],\"lastnames\":[\"Orphal-Kobin\"],\"firstnames\":[\"Laura\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Unterguggenberger\"],\"firstnames\":[\"Kilian\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Pregnolato\"],\"firstnames\":[\"Tommaso\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Kemf\"],\"firstnames\":[\"Natalia\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Matalla\"],\"firstnames\":[\"Mathias\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Unger\"],\"firstnames\":[\"Ralph-Stephan\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Ostermay\"],\"firstnames\":[\"Ina\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Pieplow\"],\"firstnames\":[\"Gregor\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Schröder\"],\"firstnames\":[\"Tim\"],\"suffixes\":[]}],\"month\":\"March\",\"year\":\"2023\",\"note\":\"Publisher: American Physical Society\",\"pages\":\"011042\",\"bibtex\":\"@article{orphal-kobin_optically_2023,\\n\\ttitle = {Optically {Coherent} {Nitrogen}-{Vacancy} {Defect} {Centers} in {Diamond} {Nanostructures}},\\n\\tvolume = {13},\\n\\turl = {https://link.aps.org/doi/10.1103/PhysRevX.13.011042},\\n\\tdoi = {10.1103/PhysRevX.13.011042},\\n\\tabstract = {Optically active solid-state spin defects have the potential to become a versatile resource for quantum information processing applications. Nitrogen-vacancy defect centers (NV) in diamond act as quantum memories and can be interfaced with coherent photons as demonstrated in entanglement protocols. However, particularly in diamond nanostructures, the effect of spectral diffusion leads to optical decoherence hindering entanglement generation. In this work, we present strategies to significantly reduce the electric noise in diamond nanostructures. We demonstrate single NVs in nanopillars exhibiting a lifetime-limited linewidth on a timescale of one second and long-term spectral stability with an inhomogeneous linewidth as low as 150 MHz over three minutes. Excitation power and energy-dependent measurements in combination with nanoscopic Monte Carlo simulations contribute to a better understanding of the impact of bulk and surface defects on the NV’s spectral properties. Finally, we propose an entanglement protocol for nanostructure-coupled NVs providing entanglement generation rates up to hundreds of kHz.},\\n\\tnumber = {1},\\n\\turldate = {2023-04-17},\\n\\tjournal = {Physical Review X},\\n\\tauthor = {Orphal-Kobin, Laura and Unterguggenberger, Kilian and Pregnolato, Tommaso and Kemf, Natalia and Matalla, Mathias and Unger, Ralph-Stephan and Ostermay, Ina and Pieplow, Gregor and Schröder, Tim},\\n\\tmonth = mar,\\n\\tyear = {2023},\\n\\tnote = {Publisher: American Physical Society},\\n\\tpages = {011042},\\n}\\n\\n\",\"author_short\":[\"Orphal-Kobin, L.\",\"Unterguggenberger, K.\",\"Pregnolato, T.\",\"Kemf, N.\",\"Matalla, M.\",\"Unger, R.\",\"Ostermay, I.\",\"Pieplow, G.\",\"Schröder, T.\"],\"key\":\"orphal-kobin_optically_2023\",\"id\":\"orphal-kobin_optically_2023\",\"bibbaseid\":\"orphalkobin-unterguggenberger-pregnolato-kemf-matalla-unger-ostermay-pieplow-etal-opticallycoherentnitrogenvacancydefectcentersindiamondnanostructures-2023\",\"role\":\"author\",\"urls\":{\"Paper\":\"https://link.aps.org/doi/10.1103/PhysRevX.13.011042\"},\"metadata\":{\"authorlinks\":{\"schröder, t\":\"https://www.physik.hu-berlin.de/en/iqp/publications\"}},\"downloads\":6,\"html\":\"\"},{\"bibtype\":\"article\",\"type\":\"article\",\"title\":\"Hidden Silicon-Vacancy Centers in Diamond\",\"volume\":\"126\",\"url\":\"https://link.aps.org/doi/10.1103/PhysRevLett.126.213601\",\"doi\":\"10.1103/PhysRevLett.126.213601\",\"abstract\":\"We characterize a high-density sample of negatively charged silicon-vacancy (SiV−) centers in diamond using collinear optical multidimensional coherent spectroscopy. By comparing the results of complementary signal detection schemes, we identify a hidden population of SiV− centers that is not typically observed in photoluminescence and which exhibits significant spectral inhomogeneity and extended electronic T2 times. The phenomenon is likely caused by strain, indicating a potential mechanism for controlling electric coherence in color-center-based quantum devices.\",\"number\":\"21\",\"urldate\":\"2022-08-03\",\"journal\":\"Physical Review Letters\",\"author\":[{\"propositions\":[],\"lastnames\":[\"Smallwood\"],\"firstnames\":[\"Christopher\",\"L.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Ulbricht\"],\"firstnames\":[\"Ronald\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Day\"],\"firstnames\":[\"Matthew\",\"W.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Schröder\"],\"firstnames\":[\"Tim\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Bates\"],\"firstnames\":[\"Kelsey\",\"M.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Autry\"],\"firstnames\":[\"Travis\",\"M.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Diederich\"],\"firstnames\":[\"Geoffrey\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Bielejec\"],\"firstnames\":[\"Edward\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Siemens\"],\"firstnames\":[\"Mark\",\"E.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Cundiff\"],\"firstnames\":[\"Steven\",\"T.\"],\"suffixes\":[]}],\"month\":\"May\",\"year\":\"2021\",\"note\":\"Publisher: American Physical Society\",\"pages\":\"213601\",\"bibtex\":\"@article{smallwood_hidden_2021,\\n\\ttitle = {Hidden {Silicon}-{Vacancy} {Centers} in {Diamond}},\\n\\tvolume = {126},\\n\\turl = {https://link.aps.org/doi/10.1103/PhysRevLett.126.213601},\\n\\tdoi = {10.1103/PhysRevLett.126.213601},\\n\\tabstract = {We characterize a high-density sample of negatively charged silicon-vacancy (SiV−) centers in diamond using collinear optical multidimensional coherent spectroscopy. By comparing the results of complementary signal detection schemes, we identify a hidden population of SiV− centers that is not typically observed in photoluminescence and which exhibits significant spectral inhomogeneity and extended electronic T2 times. The phenomenon is likely caused by strain, indicating a potential mechanism for controlling electric coherence in color-center-based quantum devices.},\\n\\tnumber = {21},\\n\\turldate = {2022-08-03},\\n\\tjournal = {Physical Review Letters},\\n\\tauthor = {Smallwood, Christopher L. and Ulbricht, Ronald and Day, Matthew W. and Schröder, Tim and Bates, Kelsey M. and Autry, Travis M. and Diederich, Geoffrey and Bielejec, Edward and Siemens, Mark E. and Cundiff, Steven T.},\\n\\tmonth = may,\\n\\tyear = {2021},\\n\\tnote = {Publisher: American Physical Society},\\n\\tpages = {213601},\\n}\\n\\n\",\"author_short\":[\"Smallwood, C. L.\",\"Ulbricht, R.\",\"Day, M. W.\",\"Schröder, T.\",\"Bates, K. M.\",\"Autry, T. M.\",\"Diederich, G.\",\"Bielejec, E.\",\"Siemens, M. E.\",\"Cundiff, S. T.\"],\"key\":\"smallwood_hidden_2021\",\"id\":\"smallwood_hidden_2021\",\"bibbaseid\":\"smallwood-ulbricht-day-schrder-bates-autry-diederich-bielejec-etal-hiddensiliconvacancycentersindiamond-2021\",\"role\":\"author\",\"urls\":{\"Paper\":\"https://link.aps.org/doi/10.1103/PhysRevLett.126.213601\"},\"metadata\":{\"authorlinks\":{\"schröder, t\":\"https://www.physik.hu-berlin.de/en/iqp/publications\"}},\"downloads\":10,\"html\":\"\"},{\"bibtype\":\"article\",\"type\":\"article\",\"title\":\"Optimized diamond inverted nanocones for enhanced color center to fiber coupling\",\"volume\":\"118\",\"issn\":\"0003-6951\",\"url\":\"https://aip.scitation.org/doi/full/10.1063/5.0050338\",\"doi\":\"10.1063/5.0050338\",\"abstract\":\"Nanostructures can be used for boosting the light outcoupling of color centers in diamond; however, the fiber coupling performance of these nanostructures is rarely investigated. Here, we use a finite element method for computing the emission from color centers in inverted nanocones and the overlap of this emission with the propagation mode in a single-mode fiber. Using different figures of merit, the inverted nanocone parameters are optimized to obtain maximal fiber coupling efficiency, free-space collection efficiency, or rate enhancement. The optimized inverted nanocone designs show promising results with 66% fiber coupling or 83% free-space coupling efficiency at the tin-vacancy center zero-phonon line wavelength of 619 nm. Moreover, when evaluated for broadband performance, the optimized designs show 55% and 76% for fiber coupling and free-space efficiencies, respectively, for collecting the full tin-vacancy emission spectrum at room temperature. An analysis of fabrication insensitivity indicates that these nanostructures are robust against imperfections. For maximum emission rate into a fiber mode, a design with a Purcell factor of 2.34 is identified. Finally, possible improvements offered by a hybrid inverted nanocone, formed by patterning into two different materials, are investigated and increase the achievable fiber coupling efficiency to 71%.\",\"number\":\"23\",\"urldate\":\"2021-10-03\",\"journal\":\"Applied Physics Letters\",\"author\":[{\"propositions\":[],\"lastnames\":[\"Torun\"],\"firstnames\":[\"Cem\",\"Güney\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Schneider\"],\"firstnames\":[\"Philipp-Immanuel\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Hammerschmidt\"],\"firstnames\":[\"Martin\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Burger\"],\"firstnames\":[\"Sven\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Munns\"],\"firstnames\":[\"Joseph\",\"H.\",\"D.\"],\"suffixes\":[]},{\"propositions\":[],\"lastnames\":[\"Schröder\"],\"firstnames\":[\"Tim\"],\"suffixes\":[]}],\"month\":\"June\",\"year\":\"2021\",\"note\":\"Publisher: American Institute of Physics\",\"pages\":\"234002\",\"bibtex\":\"@article{torun_optimized_2021,\\n\\ttitle = {Optimized diamond inverted nanocones for enhanced color center to fiber coupling},\\n\\tvolume = {118},\\n\\tissn = {0003-6951},\\n\\turl = {https://aip.scitation.org/doi/full/10.1063/5.0050338},\\n\\tdoi = {10.1063/5.0050338},\\n\\tabstract = {Nanostructures can be used for boosting the light outcoupling of color centers in diamond; however, the fiber coupling performance of these nanostructures is rarely investigated. Here, we use a finite element method for computing the emission from color centers in inverted nanocones and the overlap of this emission with the propagation mode in a single-mode fiber. Using different figures of merit, the inverted nanocone parameters are optimized to obtain maximal fiber coupling efficiency, free-space collection efficiency, or rate enhancement. The optimized inverted nanocone designs show promising results with 66\\\\% fiber coupling or 83\\\\% free-space coupling efficiency at the tin-vacancy center zero-phonon line wavelength of 619 nm. Moreover, when evaluated for broadband performance, the optimized designs show 55\\\\% and 76\\\\% for fiber coupling and free-space efficiencies, respectively, for collecting the full tin-vacancy emission spectrum at room temperature. An analysis of fabrication insensitivity indicates that these nanostructures are robust against imperfections. For maximum emission rate into a fiber mode, a design with a Purcell factor of 2.34 is identified. Finally, possible improvements offered by a hybrid inverted nanocone, formed by patterning into two different materials, are investigated and increase the achievable fiber coupling efficiency to 71\\\\%.},\\n\\tnumber = {23},\\n\\turldate = {2021-10-03},\\n\\tjournal = {Applied Physics Letters},\\n\\tauthor = {Torun, Cem Güney and Schneider, Philipp-Immanuel and Hammerschmidt, Martin and Burger, Sven and Munns, Joseph H. D. and Schröder, Tim},\\n\\tmonth = jun,\\n\\tyear = {2021},\\n\\tnote = {Publisher: American Institute of Physics},\\n\\tpages = {234002},\\n}\\n\",\"author_short\":[\"Torun, C. G.\",\"Schneider, P.\",\"Hammerschmidt, M.\",\"Burger, S.\",\"Munns, J. H. D.\",\"Schröder, T.\"],\"key\":\"torun_optimized_2021\",\"id\":\"torun_optimized_2021\",\"bibbaseid\":\"torun-schneider-hammerschmidt-burger-munns-schrder-optimizeddiamondinvertednanoconesforenhancedcolorcentertofibercoupling-2021\",\"role\":\"author\",\"urls\":{\"Paper\":\"https://aip.scitation.org/doi/full/10.1063/5.0050338\"},\"metadata\":{\"authorlinks\":{\"schröder, t\":\"https://www.physik.hu-berlin.de/en/iqp/publications\"}},\"downloads\":3,\"html\":\"\"}],\n      metadata: {\"owner\":\"schröder, t\",\"authorlinks\":{\"schröder, t\":\"https://www.physik.hu-berlin.de/en/iqp/publications\"}},\n      ownerID: \"GtPK8ZdLd6DkCwsu6\"\n    };\n  </script>\n\n  <script type=\"text/javascript\">\n  var site$;\n  if (typeof $ != 'undefined') {\n    console.log('existing jquery: storing and then restoring');\n    site$ = $;\n    $ = null;\n  }\n  </script>\n\n  <script src=\"https://ajax.googleapis.com/ajax/libs/jquery/2.2.4/jquery.min.js\">\n  </script>\n  <script type=\"text/javascript\">\n  if (site$) {\n    console.log('existing jquery: avoiding conflict and restoring');\n    bb$ = $.noConflict(true);\n    $ = site$;\n  } else {\n    bb$ = $;\n  }\n  </script>\n\n  <script src=\"//bibbase.org/js/bibbase.min.js\"\n          type=\"text/javascript\">\n  </script>\n\n  <script type=\"text/javascript\"\n          src=\"https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config=TeX-AMS-MML_HTMLorMML\">\n  </script>\n  <script type=\"text/x-mathjax-config\">\n    MathJax.Hub.Config({tex2jax: {inlineMath: [['$','$'], ['\\\\(','\\\\)']]},\n                        skipTags: [\"body\"],\n                        processClass: \"bibbase_paper\"});\n  </script>\n\n  <style>\n  @media print {\n    .dontprint {\n        display: none !important;\n    }\n\n  .bibbase_group {\n    background-color: #E0E0E0;\n    font-style: italic;\n    font-size: larger;\n    text-shadow: 0px 0px 3px #FFFFFF;\n    border-radius: 4px 4px 4px 4px;\n    -moz-border-radius: 4px 4px 4px 4px;\n    -webkit-border-radius: 4px;\n    padding: 5px 40px 5px;\n    margin-top: 10px;\n    margin-bottom: 5px;\n    cursor: pointer;\n  }\n\n  .bibbase_paper {\n    margin-bottom: 5px;\n  }\n\n  }\n  </style>\n\n  \n  <div style=\"float: right; margin-right: 10px; margin-top: 10px; text-align: right; font-size: 12px\">\n    generated by\n    <a href=\"//bibbase.org\"\n       onclick=\"trackOutboundLink('bibbase', 'logo clicked', window.location.href, '//bibbase.org'); return false;\">\n      <img src=\"//bibbase.org/img/logo.svg\"\n           style=\"vertical-align: middle; margin-left: 3px; height: 16px;\"/\n           alt=\"bibbase.org\"\n           title=\"BibBase – The easiest way to maintain your publications page.\"\n        ></a>\n    \n  </div>\n  \n\n  <div id=\"bibbase_header\" class=\"dontprint\" style=\"\">\n\n    <ul class=\"nav nav-pills\" style=\"margin: 0px;\">\n\n      <li class=\"dropdown\" id=\"groupby_dropdown\">\n      <a class=\"dropdown-toggle\"\n         data-toggle=\"dropdown\"\n         href=\"#\">\n          Group by\n          <b class=\"caret\"></b>\n      </a>\n      <ul class=\"dropdown-menu\">\n        <li class=\"groupby year\"><a onclick=\"groupby('year')\">\n            Year</a>\n        </li>\n        <li class=\"groupby author\"><a onclick=\"groupby('author_short')\">\n            Author</a>\n        </li>\n        <li class=\"groupby type\"><a onclick=\"groupby('type')\">\n            Type</a>\n        </li>\n        <li class=\"groupby keyword\"><a onclick=\"groupby('keyword')\">\n            Keyword</a>\n        </li>\n        <li class=\"groupby downloads\"><a onclick=\"groupby('downloads')\">\n            Downloads</a>\n        </li>\n      </ul>\n      </li>\n\n\n      <li class=\"dropdown\" id=\"menu_dropdown\">\n      <a class=\"dropdown-toggle\"\n         data-toggle=\"dropdown\"\n         href=\"#\" alt=\"controls\">\n          <i class=\"fa fa-reorder\" alt=\"controls\"></i>\n          <b class=\"caret\"></b>\n      </a>\n      <ul class=\"dropdown-menu\">\n        <li>\n          <a onclick=\"toggleAll()\">\n            <i class=\"fa fa-chevron-down fa-fw\"></i> Expand/Collapse All\n          </a>\n        </li>\n        <li>\n          <a download=\"items\" href=\"data:text/bibtex;base64,@misc{tsunaki_ambiguous_2024,
	title = {Ambiguous {Resonances} in {Multipulse} {Quantum} {Sensing} with {Nitrogen} {Vacancy} {Centers}},
	url = {http://arxiv.org/abs/2407.09411},
	abstract = {Dynamical decoupling multipulse sequences can be applied to solid state spins for sensing weak oscillating fields from nearby single nuclear spins. By periodically reversing the probing system's evolution, other noises are counteracted and filtered out over the total evolution. However, the technique is subject to intricate interactions resulting in additional resonant responses, which can be misinterpreted with the actual signal intended to be measured. We experimentally characterized three of these effects present in single nitrogen vacancy centers in diamond, where we also developed a numerical simulations model without rotating wave approximations, showing robust correlation to the experimental data. Regarding centers with the \${\textasciicircum}\{15\}\$N nitrogen isotope, we observed that a small misalignment in the bias magnetic field causes the precession of the nitrogen nuclear spin to be sensed by the electronic spin of the center. Another studied case of ambiguous resonances comes from the coupling with lattice \${\textasciicircum}\{13\}\$C nuclei, where we reconstructed the interaction Hamiltonian based on echo modulation frequencies and used this Hamiltonian to simulate multipulse sequences. Finally, we also measured and simulated the effects from the free evolution of the quantum system during finite pulse durations. Due to the large data volume and the strong dependency of these ambiguous resonances with specific experimental parameters, we provide a simulations dataset with a user-friendly graphical interface, where users can compare simulations with their own experimental data for spectral disambiguation. Although focused with nitrogen vacancy centers and dynamical decoupling sequences, these results and the developed model can potentially be applied to other solid state spins and quantum sensing techniques.},
	urldate = {2024-07-26},
	publisher = {arXiv},
	author = {Tsunaki, Lucas and Singh, Anmol and Volkova, Kseniia and Trofimov, Sergei and Pregnolato, Tommaso and Schröder, Tim and Naydenov, Boris},
	month = jul,
	year = {2024},
	note = {arXiv:2407.09411 [cond-mat, physics:quant-ph]},
	keywords = {Condensed Matter - Other Condensed Matter, Quantum Physics},
}



@misc{wiesner_influence_2024,
	title = {The {Influence} of {Experimental} {Imperfections} on {Photonic} {GHZ} {State} {Generation}},
	url = {http://arxiv.org/abs/2406.18257},
	abstract = {While the advantages of photonic quantum computing, including direct compatibility with communication, are apparent, several imperfections such as loss and distinguishability presently limit actual implementations. These imperfections are unlikely to be completely eliminated, and it is therefore beneficial to investigate which of these are the most dominant and what is achievable under their presence. In this work, we provide an in-depth investigation of the influence of photon loss, multi-photon terms and photon distinguishability on the generation of photonic 3-partite GHZ states via established fusion protocols. We simulate the generation process for SPDC and solid-state-based single-photon sources using realistic parameters and show that different types of imperfections are dominant with respect to the fidelity and generation success probability. Our results indicate what are the dominant imperfections for the different photon sources and in which parameter regimes we can hope to implement photonic quantum computing in the near future.},
	urldate = {2024-07-01},
	author = {Wiesner, Fabian and Chrzanowski, Helen M. and Pieplow, Gregor and Schröder, Tim and Pappa, Anna and Wolters, Janik},
	month = jun,
	year = {2024},
	note = {arXiv:2406.18257 [quant-ph]},
}



@article{orphalkobin_coherent_2024,
	title = {Coherent {Microwave}, {Optical}, and {Mechanical} {Quantum} {Control} of {Spin} {Qubits} in {Diamond}},
	issn = {2511-9044, 2511-9044},
	url = {https://onlinelibrary.wiley.com/doi/10.1002/qute.202300432},
	doi = {10.1002/qute.202300432},
	abstract = {Abstract
            Diamond has emerged as a highly promising platform for quantum network applications. Color centers in diamond fulfill the fundamental requirements for quantum nodes: they constitute optically accessible quantum systems with long‐lived spin qubits. Furthermore, they provide access to a quantum register of electronic and nuclear spin qubits and they mediate entanglement between spins and photons. All these operations require coherent control of the color center's spin state. This review provides a comprehensive overview of the state‐of‐the‐art, challenges, and prospects of such schemes, including high‐fidelity initialization, coherent manipulation, and readout of spin states. Established microwave and optical control techniques are reviewed, and moreover, emerging methods such as cavity‐mediated spin–photon interactions and mechanical control based on spin–phonon interactions are summarized. For different types of color centers, namely, nitrogen–vacancy and group‐IV color centers, distinct challenges persist that are subject of ongoing research. Beyond fundamental coherent spin qubit control techniques, advanced demonstrations in quantum network applications are outlined, for example, the integration of individual color centers for accessing (nuclear) multiqubit registers. Finally, the role of diamond spin qubits in the realization of future quantum information applications is described.},
	language = {en},
	urldate = {2024-05-17},
	journal = {Advanced Quantum Technologies},
	author = {Orphal‐Kobin, Laura and Torun, Cem Güney and Bopp, Julian M. and Pieplow, Gregor and Schröder, Tim},
	month = may,
	year = {2024},
	pages = {2300432},
}



@misc{pieplow_quantum_2024,
	title = {Quantum {Electrometer} for {Time}-{Resolved} {Material} {Science} at the {Atomic} {Lattice} {Scale}},
	url = {http://arxiv.org/abs/2401.14290},
	doi = {10.48550/arXiv.2401.14290},
	abstract = {The detection of individual charges plays a crucial role in fundamental material science and the advancement of classical and quantum high-performance technologies that operate with low noise. However, resolving charges at the lattice scale in a time-resolved manner has not been achieved so far. Here, we present the development of an electrometer, leveraging on the spectroscopy of an optically-active spin defect embedded in a solid-state material with a non-linear Stark response. By applying our approach to diamond, a widely used platform for quantum technology applications, we successfully localize charge traps, quantify their impact on transport dynamics and noise generation, analyze relevant material properties, and develop strategies for material optimization.},
	urldate = {2024-04-10},
	author = {Pieplow, Gregor and Torun, Cem Güney and Munns, Joseph H. D. and Herrmann, Franziska Marie and Thies, Andreas and Pregnolato, Tommaso and Schröder, Tim},
	month = jan,
	year = {2024},
	note = {arXiv:2401.14290 [cond-mat, physics:physics, physics:quant-ph]},
	keywords = {Condensed Matter - Materials Science, Physics - Applied Physics, Quantum Physics},
}



@article{pregnolato_fabrication_2024,
	title = {Fabrication of {Sawfish} photonic crystal cavities in bulk diamond},
	volume = {9},
	issn = {2378-0967},
	url = {https://doi.org/10.1063/5.0186509},
	doi = {10.1063/5.0186509},
	abstract = {Color centers in diamonds are quantum systems with optically active spin-states that show long coherence times and are, therefore, a promising candidate for the development of efficient spin–photon interfaces. However, only a small portion of the emitted photons is generated by the coherent optical transition of the zero-phonon line (ZPL), which limits the overall performance of the system. Embedding these emitters in photonic crystal cavities improves the coupling to the ZPL photons and increases their emission rate. Here, we demonstrate the fabrication process of “Sawfish” cavities, a design recently proposed that has the experimentally realistic potential to simultaneously provide a high waveguide coupling efficiency and significantly enhance the emission rate. The presented process allows for the fabrication of fully suspended devices with a total length of 20.5 μm and feature sizes as small as 40 nm. The optical characterization shows fundamental mode resonances that follow the behavior expected from the corresponding design parameters and quality (Q) factors as high as (3800 ± 1200). Finally, we investigate the effects of nanofabrication on the devices and show that, despite a noticeable erosion of the fine features, the measured cavity resonances deviate by only 0.8 (1.2)\% from the values estimated by simple inspection via scanning electron microscopy. This proves that the Sawfish design is robust against fabrication imperfections, which makes it an attractive choice for the development of quantum photonic networks.},
	number = {3},
	urldate = {2024-03-08},
	journal = {APL Photonics},
	author = {Pregnolato, Tommaso and Stucki, Marco E. and Bopp, Julian M. and v. d. Hoeven, Maarten H. and Gokhale, Alok and Krüger, Olaf and Schröder, Tim},
	month = mar,
	year = {2024},
	pages = {036105},
}



@article{pieplow_efficient_2024,
	title = {Efficient microwave spin control of negatively charged group-{IV} color centers in diamond},
	volume = {109},
	url = {https://link.aps.org/doi/10.1103/PhysRevB.109.115409},
	doi = {10.1103/PhysRevB.109.115409},
	abstract = {In this paper, we provide a comprehensive overview of the microwave-induced manipulation of electronic spin states in negatively charged group-IV color centers in diamond with a particular emphasis on the influence of strain. Central to our investigation is the consideration of the full vectorial attributes of the magnetic fields involved, which are a dc field for lifting the degeneracy of the spin levels and an ac field for microwave control between two spin levels. We observe an intricate interdependence between their spatial orientations, the externally applied strain, and the resultant efficacy in spin-state control. In most studies to date the ac and dc magnetic field orientations have been insufficiently addressed, which has led to the conclusion that strain is indispensable for the effective microwave control of heavier group-IV vacancies, such as tin- and lead-vacancy color centers. In contrast, we find that the alignment of the dc magnetic field orthogonal to the symmetry axis and the ac field parallel to it can make the application of strain obsolete for effective spin manipulation. Furthermore, we explore the implications of this field configuration on the spin's optical initialization, readout, and gate fidelities.},
	number = {11},
	urldate = {2024-03-08},
	journal = {Physical Review B},
	author = {Pieplow, Gregor and Belhassen, Mohamed and Schröder, Tim},
	month = mar,
	year = {2024},
	note = {Publisher: American Physical Society},
	pages = {115409},
}



@misc{bopp_diamond--chip_2023,
	title = {Diamond-on-chip infrared absorption magnetic field camera},
	url = {http://arxiv.org/abs/2401.00854},
	doi = {10.48550/arXiv.2401.00854},
	abstract = {Integrated and fiber-packaged magnetic field sensors with a sensitivity sufficient to sense electric pulses propagating along nerves in life science applications and with a spatial resolution fine enough to resolve their propagation directions will trigger a tremendous step ahead not only in medical diagnostics, but in understanding neural processes. Nitrogen-vacancy centers in diamond represent the leading platform for such sensing tasks under ambient conditions. Current research on uniting a good sensitivity and a high spatial resolution is facilitated by scanning or imaging techniques. However, these techniques employ moving parts or bulky microscope setups. Despite being far developed, both approaches cannot be integrated and fiber-packaged to build a robust, adjustment-free hand-held device. In this work, we introduce novel concepts for spatially resolved magnetic field sensing and 2-D gradiometry with an integrated magnetic field camera. The camera is based on infrared absorption optically detected magnetic resonance (IRA-ODMR) mediated by perpendicularly intersecting infrared and pump laser beams forming a pixel matrix. We demonstrate our 3-by-3 pixel sensor's capability to reconstruct the position of an electromagnet in space. Furthermore, we identify routes to enhance the magnetic field camera's sensitivity and spatial resolution as required for complex sensing applications.},
	urldate = {2024-01-04},
	publisher = {arXiv},
	author = {Bopp, Julian M. and Conradi, Hauke and Perona, Felipe and Palaci, Anil and Wollenberg, Jonas and Flisgen, Thomas and Liero, Armin and Christopher, Heike and Keil, Norbert and Knolle, Wolfgang and Knigge, Andrea and Heinrich, Wolfgang and Kleinert, Moritz and Schröder, Tim},
	month = dec,
	year = {2023},
	note = {arXiv:2401.00854 [physics, physics:quant-ph]},
	keywords = {Physics - Applied Physics, Physics - Optics, Quantum Physics},
}



@article{bopp_sawfish_2023,
	title = {‘{Sawfish}’ {Photonic} {Crystal} {Cavity} for {Near}-{Unity} {Emitter}-to-{Fiber} {Interfacing} in {Quantum} {Network} {Applications}},
	volume = {n/a},
	copyright = {© 2023 The Authors. Advanced Optical Materials published by Wiley-VCH GmbH},
	issn = {2195-1071},
	url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/adom.202301286},
	doi = {10.1002/adom.202301286},
	abstract = {Photon loss is one of the key challenges to overcome in complex photonic quantum applications. Photon collection efficiencies directly impact the amount of resources required for measurement-based quantum computation and communication networks. Promising resources include solid-state quantum light sources. However, efficiently coupling light from a single quantum emitter to a guided mode remains demanding. In this work, photon losses are eliminated by maximizing coupling efficiencies in an emitter-to-fiber interface. A waveguide-integrated ‘Sawfish’ photonic crystal cavity is developed and finite element (FEM) simulations are employed to demonstrate that such an emitter-to-fiber interface transfers, with 97.4 \% efficiency, the zero-phonon line (ZPL) emission of a negatively-charged tin vacancy center in diamond (SnV−) adiabatically to a single-mode fiber. A surrogate model trained by machine learning provides quantitative estimates of sensitivities to fabrication tolerances. The corrugation-based Sawfish design proves robust under state-of-the-art nanofabrication parameters, maintaining an emitter-to-fiber coupling efficiency of 88.6 \%. Applying the Sawfish cavity to a recent one-way quantum repeater protocol substantiates its potential in reducing resource requirements in quantum communication.},
	language = {en},
	number = {n/a},
	urldate = {2023-12-18},
	journal = {Advanced Optical Materials},
	author = {Bopp, Julian M. and Plock, Matthias and Turan, Tim and Pieplow, Gregor and Burger, Sven and Schröder, Tim},
	month = dec,
	year = {2023},
	note = {\_eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1002/adom.202301286},
	keywords = {Debye-Waller factor, Purcell enhancement, Sawfish cavity, adiabatic coupling, diamond color center, photonic crystal cavity, photonic losses},
	pages = {2301286},
}



@misc{torun_optical_2023,
	title = {Optical probing of phononic properties of a tin-vacancy color center in diamond},
	url = {http://arxiv.org/abs/2312.05335},
	doi = {10.48550/arXiv.2312.05335},
	abstract = {The coherence characteristics of a tin-vacancy color center in diamond are investigated through optical means including coherent population trapping between the ground state orbital levels and linewidth broadening effects. Due to the large spin-orbit splitting of the orbital ground states, thermalization between the ground states occurs at rates that are impractical to measure directly. Here, spectral information is transformed into its conjugate variable time, providing picosecond resolution and revealing an orbital depolarization timescale of \$\{{\textbackslash}sim30\{{\textbackslash}rm{\textasciitilde}ps\}\}\$. Consequences of the investigated dynamics are then used to estimate spin dephasing times limited by thermal effects.},
	urldate = {2023-12-12},
	publisher = {arXiv},
	author = {Torun, Cem Güney and Munns, Joseph H. D. and Herrmann, Franziska Marie and Villafane, Viviana and Müller, Kai and Thies, Andreas and Pregnolato, Tommaso and Pieplow, Gregor and Schröder, Tim},
	month = dec,
	year = {2023},
	note = {arXiv:2312.05335 [physics, physics:quant-ph]},
	keywords = {Physics - Applied Physics, Quantum Physics},
}



@misc{gundogdu_algan_2023,
	title = {{AlGaN} photonic device platform},
	url = {http://arxiv.org/abs/2312.03128},
	doi = {10.48550/arXiv.2312.03128},
	abstract = {In the rapidly evolving area of integrated photonics, there is a growing need for materials to support the fast development of advanced and more complex optical on-chip systems. Present photonic material platforms have significantly progressed over the past years; however, at the same time, they face critical challenges. We introduce a novel material for integrated photonics and investigate Aluminum Gallium Nitride (AlGaN) on Aluminum Nitride (AlN) templates as a platform for developing reconfigurable and on-chip nonlinear optical devices. AlGaN combines compatibility with standard fabrication technologies and high electro-optic modulation capabilities with reduced loss in a broad spectrum, making it a viable material for advanced photonic applications. We engineer and grow light-guiding photonic layers and fabricate waveguides, directional couplers, and other on-chip devices. Our AlGaN ring resonators demonstrate tunability and high Q-factors due to the low-loss waveguiding. The comprehensive platform paves the way for nonlinear photon-pair generation applications, on-chip nonlinear quantum frequency conversion, and fast electro-optic modulation for switching and routing.},
	urldate = {2023-12-11},
	publisher = {arXiv},
	author = {Gündogdu, Sinan and Pazzagli, Sofia and Pregnolato, Tommaso and Kolbe, Tim and Hagedorn, Sylvia and Weyers, Markus and Schröder, Tim},
	month = dec,
	year = {2023},
	note = {arXiv:2312.03128 [physics]},
	keywords = {Physics - Applied Physics, Physics - Optics},
}



@misc{pieplow_deterministic_2023,
	title = {Deterministic {Creation} of {Large} {Photonic} {Multipartite} {Entangled} {States} with {Group}-{IV} {Color} {Centers} in {Diamond}},
	url = {http://arxiv.org/abs/2312.03952},
	doi = {10.48550/arXiv.2312.03952},
	abstract = {Measurement-based quantum computation relies on single qubit measurements of large multipartite entangled states, so-called lattice-graph or cluster states. Graph states are also an important resource for quantum communication, where tree cluster states are a key resource for one-way quantum repeaters. A photonic realization of this kind of state would inherit many of the benefits of photonic platforms, such as very little dephasing due to weak environmental interactions and the well-developed infrastructure to route and measure photonic qubits. In this work, a linear cluster state and GHZ state generation scheme is developed for group-IV color centers. In particular, this article focuses on an in-depth investigation of the required control operations, including the coherent spin and excitation gates. We choose an off-resonant Raman scheme for the spin gates, which can be much faster than microwave control. We do not rely on a reduced level scheme and use efficient approximations to design high-fidelity Raman gates. We benchmark the spin-control and excitation scheme using the tin vacancy color center coupled to a cavity, assuming a realistic experimental setting. Additionally, the article investigates the fidelities of the Raman and excitation gates in the presence of radiative and non-radiative decay mechanisms. Finally, a quality measure is devised, which emphasizes the importance of fast and high-fidelity spin gates in the creation of large entangled photonic states.},
	urldate = {2023-12-11},
	publisher = {arXiv},
	author = {Pieplow, Gregor and Strocka, Yannick and Isaza-Monsalve, Mariano and Munns, Joseph H. D. and Schröder, Tim},
	month = dec,
	year = {2023},
	note = {arXiv:2312.03952 [quant-ph]},
	keywords = {Quantum Physics},
}



@misc{torun_super_2023,
	title = {{SUPER} and subpicosecond coherent control of an optical qubit in a tin-vacancy color center in diamond},
	url = {http://arxiv.org/abs/2312.05246},
	doi = {10.48550/arXiv.2312.05246},
	abstract = {The coherent excitation of an optically active spin system is one of the key elements in the engineering of a spin-photon interface. In this work, we use the novel SUPER scheme, employing nonresonant ultrashort optical pulses, to coherently control the main optical transition of a tin-vacancy color center in diamond, a promising emitter that can both be utilized as a quantum memory and a single-photon source. Furthermore, we implement a subpicosecond control scheme using resonant pulses for achieving record short quantum gates applied to diamond color centers. The employed ultrafast quantum gates open up a new regime of quantum information processing with solid-state color centers, eventually enabling multi-gate operations with the optical qubit and efficient spectral filtering of the excitation laser from deterministically prepared coherent photons.},
	urldate = {2023-12-11},
	publisher = {arXiv},
	author = {Torun, Cem Güney and Gökçe, Mustafa and Bracht, Thomas K. and Monsalve, Mariano Isaza and Benbouabdellah, Sarah and Nacitarhan, Özgün Ozan and Stucki, Marco E. and Markham, Matthew L. and Pieplow, Gregor and Pregnolato, Tommaso and Munns, Joseph H. D. and Reiter, Doris E. and Schröder, Tim},
	month = dec,
	year = {2023},
	note = {arXiv:2312.05246 [quant-ph]},
	keywords = {Quantum Physics},
}



@misc{wo_resource-efficient_2023,
	title = {Resource-efficient fault-tolerant one-way quantum repeater with code concatenation},
	url = {http://arxiv.org/abs/2306.07224},
	doi = {10.48550/arXiv.2306.07224},
	abstract = {One-way quantum repeaters where loss and operational errors are counteracted by quantum error correcting codes can ensure fast and reliable qubit transmission in quantum networks. It is crucial that the resource requirements of such repeaters, for example, the number of qubits per repeater node and the complexity of the quantum error correcting operations are kept to a minimum to allow for near-future implementations. To this end, we propose a one-way quantum repeater that targets both the loss and operational error rates in a communication channel in a resource-efficient manner using code concatenation. Specifically, we consider a tree-cluster code as an inner loss-tolerant code concatenated with an outer 5-qubit code for protection against Pauli errors. Adopting flag-based stabilizer measurements, we show that intercontinental distances of up to 10,000 km can be bridged with a minimal resource overhead by interspersing repeater nodes that each specializes in suppressing either loss or operational errors. Our work demonstrates how tailored error-correcting codes can significantly lower the experimental requirements for long-distance quantum communication.},
	urldate = {2023-11-16},
	publisher = {arXiv},
	author = {Wo, Kah Jen and Avis, Guus and Rozpędek, Filip and Mor-Ruiz, Maria Flors and Pieplow, Gregor and Schröder, Tim and Jiang, Liang and Sørensen, Anders Søndberg and Borregaard, Johannes},
	month = oct,
	year = {2023},
	note = {arXiv:2306.07224 [quant-ph]},
	keywords = {Quantum Physics},
}



@inproceedings{bopp_sawfish_2023-1,
	title = {‘{Sawfish}’ {Spin}-{Photon} {Interface} for {Near}-{Unity} {Emitter}-to-{Waveguide} {Coupling}},
	copyright = {\&\#169; 2023 The Author(s)},
	url = {https://opg.optica.org/abstract.cfm?uri=CLEO_SI-2023-SF1O.6},
	doi = {10.1364/CLEO_SI.2023.SF1O.6},
	abstract = {Interfacing spin-active solid-state quantum emitters or memories with photons remains a challenging task due to photon losses. We propose and demonstrate the ‘Sawfish’ photonic crystal cavity to eliminate photon losses at spin-photon interfaces.},
	language = {EN},
	urldate = {2023-08-29},
	booktitle = {{CLEO} 2023 (2023), paper {SF1O}.6},
	publisher = {Optica Publishing Group},
	author = {Bopp, Julian M. and Plock, Matthias and Turan, Tim and Pieplow, Gregor and Burger, Sven and Schröder, Tim},
	month = may,
	year = {2023},
	pages = {SF1O.6},
}



@inproceedings{orphal-kobin_overcoming_2023,
	title = {Overcoming {Spectral} {Diffusion} for {Enhanced} {Spin}-{Photon} {Entanglement} using {NV} {Defect} {Centers} in {Diamond} {Nanostructures}},
	copyright = {\&\#169; 2023 The Author(s)},
	url = {https://opg.optica.org/abstract.cfm?uri=CLEO_FS-2023-FTh1A.6},
	doi = {10.1364/CLEO_FS.2023.FTh1A.6},
	abstract = {Optically coherent NV defect centers in diamond nanostructures are demonstrated using a combination of methods that mitigate spectral diffusion, including sample choice, fabrication, and experimental control. Entanglement rates enhanced by orders of magnitude are proposed.},
	language = {EN},
	urldate = {2023-08-29},
	booktitle = {{CLEO} 2023 (2023), paper {FTh1A}.6},
	publisher = {Optica Publishing Group},
	author = {Orphal-Kobin, Laura and Unterguggenberger, Kilian and Pregnolato, Tommaso and Kemf, Natalia and Matalla, Mathias and Unger, Ralph-Stephan and Ostermay, Ina and Pieplow, Gregor and Schröder, Tim},
	month = may,
	year = {2023},
	pages = {FTh1A.6},
}



@patent{schroder_sensor_2022,
	title = {Sensor for measuring a magnetic field},
	url = {https://patents.google.com/patent/EP4099041A1/en},
	abstract = {An embodiment of the invention relates to a sensor comprising a sensor element (10) for measuring a magnetic field, the sensor element (10) comprising a set of at least two first input ports (Il), a set of at least two exit ports (E) each of which is connected to one of the first input ports (I1) via a corresponding first beam path (B1), a set of at least two second input ports (12) each of which is connected to a second beam path (B2), wherein the first beam paths (B1) extend through a common plane (CP) located inside the sensor element (10), said plane (CP) comprising a plurality of magneto-optically responsive defect centers, wherein the second beam paths (B2) also extend through said common plane (CP), but are angled with respect to the first beam paths (B1) such that a plurality of intersections between the first and second beam paths (B2) is defined, and wherein each intersection forms a sensor pixel (P) located at at least one of said magneto-optically responsive defect centers.},
	nationality = {EP},
	assignee = {Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV, Humboldt Universitaet zu Berlin},
	number = {EP4099041A1},
	urldate = {2023-08-08},
	author = {Schröder, Tim and MARTINEZ, Felipe PERONA and BOPP, Julian and KLEINERT, Moritz and CONRADI, Hauke},
	month = dec,
	year = {2022},
	keywords = {beam paths, emitter, radiation, sensor, sensor element},
}



@incollection{munns_quantum_2023,
	title = {Quantum {Optics} with {Solid}-{State} {Color} {Centers}},
	copyright = {© 2023 Wiley-VCH GmbH},
	isbn = {978-3-527-83742-7},
	url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/9783527837427.ch19},
	abstract = {With the chapter “Quantum Optics with Solid-State Color Centers,” we provide a comprehensive overview of color centers in wide-bandgap materials: We describe their generation and energy level schemes, how they are controlled both optically and via microwaves, and how they are used in quantum optics and technology. The chapter summarizes landmark experiments including applications ranging from single photon generation, over quantum memories, quantum gates, to entanglement generation. We structured the chapter such that the reader has access to a bottom-up introduction but can also directly jump to sections of interest. This work is directed at graduate students up to the principal investigator level.},
	language = {en},
	urldate = {2023-07-26},
	booktitle = {Photonic {Quantum} {Technologies}},
	publisher = {John Wiley \& Sons, Ltd},
	author = {Munns, Joseph H.D. and Orphal-Kobin, Laura and Pieplow, Gregor and Schröder, Tim},
	year = {2023},
	doi = {10.1002/9783527837427.ch19},
	note = {Section: 19
\_eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1002/9783527837427.ch19},
	keywords = {color centers, diamond, optically active solid-state spin defects, quantum optics, quantum technology, review, silicon carbide, single photon emitters, wide-bandgap materials},
	pages = {509--562},
}



@book{benyoucef_photonic_2023,
	title = {Photonic {Quantum} {Technologies}: {Science} and {Applications}},
	isbn = {978-3-527-41412-3},
	shorttitle = {Photonic {Quantum} {Technologies}},
	abstract = {Brings together top-level research results to enable the development of practical quantum devices In Photonic Quantum Technologies: Science and Applications, the editor Mohamed Benyoucef and a team of distinguished scientists from different disciplines deliver an authoritative, one-stop overview of up-to-date research on various quantum systems. This unique book reviews the state-of-the-art research in photonic quantum technologies and bridges the fundamentals of the field with applications to provide readers from academia and industry, in one-location resource, with cutting-edge knowledge they need to have to understand and develop practical quantum systems for application in e.g., secure quantum communication, quantum metrology, and quantum computing. The book also addresses fundamental and engineering challenges en route to workable quantum devices and ways to circumvent or overcome them. Readers will also find:  A thorough introduction to the fundamentals of quantum technologies, including discussions of the second quantum revolution (by Nobel Laureate Alain Aspect), solid-state quantum optics, and non-classical light and quantum entanglement Comprehensive explorations of emerging quantum technologies and their practical applications, including quantum repeaters, satellite-based quantum communication, quantum networks, silicon quantum photonics, integrated quantum systems, and future vision Practical discussions of quantum technologies with artificial atoms, color centers, 2D materials, molecules, atoms, ions, atom-atom entanglement, and optical clocks  Perfect for molecular and solid-state physicists, Photonic Quantum Technologies: Science and Applications will also benefit industrial and academic researchers in photonics and quantum optics, graduate students in the field; engineers, chemists, and computer and material scientists.},
	language = {en},
	publisher = {Wiley},
	author = {Benyoucef, Mohamed},
	month = jul,
	year = {2023},
	note = {Google-Books-ID: GFGAzgEACAAJ},
	keywords = {Science / Physics / Electromagnetism, Science / Physics / Optics \& Light},
}



@article{javadi_spinphoton_2018,
	title = {Spin–photon interface and spin-controlled photon switching in a nanobeam waveguide},
	volume = {13},
	copyright = {2018 The Author(s)},
	issn = {1748-3395},
	url = {https://www.nature.com/articles/s41565-018-0091-5},
	doi = {10.1038/s41565-018-0091-5},
	abstract = {The spin of an electron is a promising memory state and qubit. Connecting spin states that are spatially far apart will enable quantum nodes and quantum networks based on the electron spin. Towards this goal, an integrated spin–photon interface would be a major leap forward as it combines the memory capability of a single spin with the efficient transfer of information by photons. Here, we demonstrate such an efficient and optically programmable interface between the spin of an electron in a quantum dot and photons in a nanophotonic waveguide. The spin can be deterministically prepared in the ground state with a fidelity of up to 96\%. Subsequently, the system is used to implement a single-spin photonic switch, in which the spin state of the electron directs the flow of photons through the waveguide. The spin–photon interface may enable on-chip photon–photon gates, single-photon transistors and the efficient generation of a photonic cluster state.},
	language = {en},
	number = {5},
	urldate = {2022-08-03},
	journal = {Nature Nanotechnology},
	author = {Javadi, Alisa and Ding, Dapeng and Appel, Martin Hayhurst and Mahmoodian, Sahand and Löbl, Matthias Christian and Söllner, Immo and Schott, Rüdiger and Papon, Camille and Pregnolato, Tommaso and Stobbe, Søren and Midolo, Leonardo and Schröder, Tim and Wieck, Andreas Dirk and Ludwig, Arne and Warburton, Richard John and Lodahl, Peter},
	month = may,
	year = {2018},
	note = {Number: 5
Publisher: Nature Publishing Group},
	keywords = {Nanophotonics and plasmonics, Quantum optics, Single photons and quantum effects},
	pages = {398--403},
}



@article{wan_efficient_2018,
	title = {Efficient {Extraction} of {Light} from a {Nitrogen}-{Vacancy} {Center} in a {Diamond} {Parabolic} {Reflector}},
	volume = {18},
	issn = {1530-6984},
	url = {https://doi.org/10.1021/acs.nanolett.7b04684},
	doi = {10.1021/acs.nanolett.7b04684},
	abstract = {Quantum emitters in solids are being developed for a range of quantum technologies, including quantum networks, computing, and sensing. However, a remaining challenge is the poor photon collection due to the high refractive index of most host materials. Here we overcome this limitation by introducing monolithic parabolic reflectors as an efficient geometry for broadband photon extraction from quantum emitter and experimentally demonstrate this device for the nitrogen-vacancy (NV) center in diamond. Simulations indicate a photon collection efficiency exceeding 75\% across the visible spectrum and experimental devices, fabricated using a high-throughput gray scale lithography process, demonstrating a photon extraction efficiency of (41 ± 5)\%. This device enables a raw experimental detection efficiency of (12 ± 1)\% with fluorescence detection rates as high as (4.114 ± 0.003) × 106 counts per second (cps) from a single NV center. Enabled by our deterministic emitter localization and fabrication process, we find a high number of exceptional devices with an average count rate of (3.1 ± 0.9) × 106 cps.},
	number = {5},
	urldate = {2022-08-03},
	journal = {Nano Letters},
	author = {Wan, Noel H. and Shields, Brendan J. and Kim, Donggyu and Mouradian, Sara and Lienhard, Benjamin and Walsh, Michael and Bakhru, Hassaram and Schröder, Tim and Englund, Dirk},
	month = may,
	year = {2018},
	note = {Publisher: American Chemical Society},
	pages = {2787--2793},
}



@article{marseglia_bright_2018,
	title = {Bright nanowire single photon source based on {SiV} centers in diamond},
	volume = {26},
	copyright = {\&\#169; 2018 Optical Society of America},
	issn = {1094-4087},
	url = {https://opg.optica.org/oe/abstract.cfm?uri=oe-26-1-80},
	doi = {10.1364/OE.26.000080},
	abstract = {The practical implementation of many quantum technologies relies on the development of robust and bright single photon sources that operate at room temperature. The negatively charged silicon-vacancy (SiV\&\#x02212;) color center in diamond is a possible candidate for such a single photon source. However, due to the high refraction index mismatch to air, color centers in diamond typically exhibit low photon out-coupling. An additional shortcoming is due to the random localization of native defects in the diamond sample. Here we demonstrate deterministic implantation of Si ions with high conversion efficiency to single SiV\&\#x02212; centers, targeted to fabricated nanowires. The co-localization of single SiV\&\#x02212; centers with the nanostructures yields a ten times higher light coupling efficiency than for single SiV\&\#x02212; centers in bulk diamond. This enhanced photon out-coupling, together with the intrinsic scalability of the SiV\&\#x02212; creation method, enables a new class of devices for integrated photonics and quantum science.},
	language = {EN},
	number = {1},
	urldate = {2022-08-03},
	journal = {Optics Express},
	author = {Marseglia, L. and Saha, K. and Ajoy, A. and Schröder, T. and Englund, D. and Jelezko, F. and Walsworth, R. and Pacheco, J. L. and Perry, D. L. and Bielejec, E. S. and Cappellaro, P.},
	month = jan,
	year = {2018},
	note = {Publisher: Optica Publishing Group},
	pages = {80--89},
}



@article{bersin_individual_2019,
	title = {Individual control and readout of qubits in a sub-diffraction volume},
	volume = {5},
	copyright = {2019 The Author(s)},
	issn = {2056-6387},
	url = {https://www.nature.com/articles/s41534-019-0154-y},
	doi = {10.1038/s41534-019-0154-y},
	abstract = {Medium-scale ensembles of coupled qubits offer a platform for near-term quantum technologies as well as studies of many-body physics. A central challenge for coherent control of such systems is the ability to measure individual quantum states without disturbing nearby qubits. Here, we demonstrate the measurement of individual qubit states in a sub-diffraction cluster by selectively exciting spectrally distinguishable nitrogen vacancy centers. We perform super-resolution localization of single centers with nanometer spatial resolution, as well as individual control and readout of spin populations. These measurements indicate a readout-induced crosstalk on non-addressed qubits below 4 × 10−2. This approach opens the door to high-speed control and measurement of qubit registers in mesoscopic spin clusters, with applications ranging from entanglement-enhanced sensors to error-corrected qubit registers to multiplexed quantum repeater nodes.},
	language = {en},
	number = {1},
	urldate = {2022-08-03},
	journal = {npj Quantum Information},
	author = {Bersin, Eric and Walsh, Michael and Mouradian, Sara L. and Trusheim, Matthew E. and Schröder, Tim and Englund, Dirk},
	month = may,
	year = {2019},
	note = {Number: 1
Publisher: Nature Publishing Group},
	keywords = {Atom optics, Quantum information, Quantum optics, Single photons and quantum effects, Sub-wavelength optics},
	pages = {1--6},
}



@article{ding_coherent_2019,
	title = {Coherent {Optical} {Control} of a {Quantum}-{Dot} {Spin}-{Qubit} in a {Waveguide}-{Based} {Spin}-{Photon} {Interface}},
	volume = {11},
	url = {https://link.aps.org/doi/10.1103/PhysRevApplied.11.031002},
	doi = {10.1103/PhysRevApplied.11.031002},
	abstract = {Waveguide-based spin-photon interfaces on the GaAs platform have emerged as a promising system for a variety of quantum information applications directly integrated into planar photonic circuits. The coherent control of spin states in a quantum dot can be achieved by applying circularly polarized laser pulses that may be coupled into the planar waveguide vertically through radiation modes. However, proper control of the laser polarization is challenging since the polarization is modified through the transformation from the far field to the exact position of the quantum dot in the nanostructure. Here, we demonstrate polarization-controlled excitation of a quantum-dot electron spin and use that to perform coherent control in a Ramsey interferometry experiment. The Ramsey interference reveals an inhomogeneous dephasing time of 2.2±0.1 ns, which is comparable to the values so far only obtained in bulk media. We analyze the experimental limitations in spin initialization fidelity and Ramsey contrast and identify the underlying mechanisms.},
	number = {3},
	urldate = {2022-08-03},
	journal = {Physical Review Applied},
	author = {Ding, Dapeng and Appel, Martin Hayhurst and Javadi, Alisa and Zhou, Xiaoyan and Löbl, Matthias Christian and Söllner, Immo and Schott, Rüdiger and Papon, Camille and Pregnolato, Tommaso and Midolo, Leonardo and Wieck, Andreas Dirk and Ludwig, Arne and Warburton, Richard John and Schröder, Tim and Lodahl, Peter},
	month = mar,
	year = {2019},
	note = {Publisher: American Physical Society},
	pages = {031002},
}



@article{borregaard_one-way_2020,
	title = {One-{Way} {Quantum} {Repeater} {Based} on {Near}-{Deterministic} {Photon}-{Emitter} {Interfaces}},
	volume = {10},
	url = {https://link.aps.org/doi/10.1103/PhysRevX.10.021071},
	doi = {10.1103/PhysRevX.10.021071},
	abstract = {We propose a novel one-way quantum repeater architecture based on photonic tree-cluster states. Encoding a qubit in a photonic tree cluster protects the information from transmission loss and enables long-range quantum communication through a chain of repeater stations. As opposed to conventional approaches that are limited by the two-way communication time, the overall transmission rate of the current quantum repeater protocol is determined by the local processing time enabling very high communication rates. We further show that such a repeater can be constructed with as little as two stationary qubits and one quantum emitter per repeater station, which significantly increases the experimental feasibility. We discuss potential implementations with diamond defect centers and semiconductor quantum dots efficiently coupled to photonic nanostructures and outline how such systems may be integrated into repeater stations.},
	number = {2},
	urldate = {2022-08-03},
	journal = {Physical Review X},
	author = {Borregaard, Johannes and Pichler, Hannes and Schröder, Tim and Lukin, Mikhail D. and Lodahl, Peter and Sørensen, Anders S.},
	month = jun,
	year = {2020},
	note = {Publisher: American Physical Society},
	pages = {021071},
}



@article{pregnolato_deterministic_2020,
	title = {Deterministic positioning of nanophotonic waveguides around single self-assembled quantum dots},
	volume = {5},
	url = {https://aip.scitation.org/doi/full/10.1063/1.5117888},
	doi = {10.1063/1.5117888},
	abstract = {The capability to embed self-assembled quantum dots (QDs) at predefined positions in nanophotonic structures is key to the development of complex quantum-photonic architectures. Here, we demonstrate that QDs can be deterministically positioned in nanophotonic waveguides by pre-locating QDs relative to a global reference frame using micro-photoluminescence (μPL) spectroscopy. After nanofabrication, μPL images reveal misalignments between the central axis of the waveguide and the embedded QD of only (9 ± 46) nm and (1 ± 33) nm for QDs embedded in undoped and doped membranes, respectively. A priori knowledge of the QD positions allows us to study the spectral changes introduced by nanofabrication. We record average spectral shifts ranging from 0.1 nm to 1.1 nm, indicating that the fabrication-induced shifts can generally be compensated by electrical or thermal tuning of the QDs. Finally, we quantify the effects of the nanofabrication on the polarizability, the permanent dipole moment, and the emission frequency at vanishing electric field of different QD charge states, finding that these changes are constant down to QD-surface separations of only 70 nm. Consequently, our approach deterministically integrates QDs into nanophotonic waveguides whose light-fields contain nanoscale structure and whose group index varies at the nanometer level.},
	number = {8},
	urldate = {2022-08-03},
	journal = {APL Photonics},
	author = {Pregnolato, T. and Chu, X.-L. and Schröder, T. and Schott, R. and Wieck, A. D. and Ludwig, A. and Lodahl, P. and Rotenberg, N.},
	month = aug,
	year = {2020},
	note = {Publisher: American Institute of Physics},
	pages = {086101},
}



@article{bates_using_2021,
	title = {Using silicon-vacancy centers in diamond to probe the full strain tensor},
	volume = {130},
	issn = {0021-8979},
	url = {https://aip.scitation.org/doi/full/10.1063/5.0052613},
	doi = {10.1063/5.0052613},
	abstract = {An ensemble of silicon vacancy (
SiV
−
SiV−
) centers in diamond is probed using two-pulse correlation spectroscopy and multidimensional coherent spectroscopy. Two main distinct families of 
SiV
−
SiV−
 centers are identified, and these families are paired with two orientation groups by comparing spectra from different linear polarizations of the incident laser. By tracking the peak centers in the measured spectra, the full diamond strain tensor is calculated local to the laser spot. Measurements are made at multiple points on the sample surface, and variations in the strain tensor are observed.},
	number = {2},
	urldate = {2022-08-03},
	journal = {Journal of Applied Physics},
	author = {Bates, Kelsey M. and Day, Matthew W. and Smallwood, Christopher L. and Owen, Rachel C. and Schröder, Tim and Bielejec, Edward and Ulbricht, Ronald and Cundiff, Steven T.},
	month = jul,
	year = {2021},
	note = {Publisher: American Institute of Physics},
	pages = {024301},
}



@article{laucht_roadmap_2021,
	title = {Roadmap on quantum nanotechnologies},
	volume = {32},
	issn = {0957-4484},
	url = {https://doi.org/10.1088/1361-6528/abb333},
	doi = {10.1088/1361-6528/abb333},
	abstract = {Quantum phenomena are typically observable at length and time scales smaller than those of our everyday experience, often involving individual particles or excitations. The past few decades have seen a revolution in the ability to structure matter at the nanoscale, and experiments at the single particle level have become commonplace. This has opened wide new avenues for exploring and harnessing quantum mechanical effects in condensed matter. These quantum phenomena, in turn, have the potential to revolutionize the way we communicate, compute and probe the nanoscale world. Here, we review developments in key areas of quantum research in light of the nanotechnologies that enable them, with a view to what the future holds. Materials and devices with nanoscale features are used for quantum metrology and sensing, as building blocks for quantum computing, and as sources and detectors for quantum communication. They enable explorations of quantum behaviour and unconventional states in nano- and opto-mechanical systems, low-dimensional systems, molecular devices, nano-plasmonics, quantum electrodynamics, scanning tunnelling microscopy, and more. This rapidly expanding intersection of nanotechnology and quantum science/technology is mutually beneficial to both fields, laying claim to some of the most exciting scientific leaps of the last decade, with more on the horizon.},
	language = {en},
	number = {16},
	urldate = {2022-08-03},
	journal = {Nanotechnology},
	author = {Laucht, Arne and Hohls, Frank and Ubbelohde, Niels and Gonzalez-Zalba, M. Fernando and Reilly, David J. and Stobbe, Søren and Schröder, Tim and Scarlino, Pasquale and Koski, Jonne V. and Dzurak, Andrew and Yang, Chih-Hwan and Yoneda, Jun and Kuemmeth, Ferdinand and Bluhm, Hendrik and Pla, Jarryd and Hill, Charles and Salfi, Joe and Oiwa, Akira and Muhonen, Juha T. and Verhagen, Ewold and LaHaye, M. D. and Kim, Hyun Ho and Tsen, Adam W. and Culcer, Dimitrie and Geresdi, Attila and Mol, Jan A. and Mohan, Varun and Jain, Prashant K. and Baugh, Jonathan},
	month = feb,
	year = {2021},
	note = {Publisher: IOP Publishing},
	pages = {162003},
}



@article{orphal-kobin_optically_2023,
	title = {Optically {Coherent} {Nitrogen}-{Vacancy} {Defect} {Centers} in {Diamond} {Nanostructures}},
	volume = {13},
	url = {https://link.aps.org/doi/10.1103/PhysRevX.13.011042},
	doi = {10.1103/PhysRevX.13.011042},
	abstract = {Optically active solid-state spin defects have the potential to become a versatile resource for quantum information processing applications. Nitrogen-vacancy defect centers (NV) in diamond act as quantum memories and can be interfaced with coherent photons as demonstrated in entanglement protocols. However, particularly in diamond nanostructures, the effect of spectral diffusion leads to optical decoherence hindering entanglement generation. In this work, we present strategies to significantly reduce the electric noise in diamond nanostructures. We demonstrate single NVs in nanopillars exhibiting a lifetime-limited linewidth on a timescale of one second and long-term spectral stability with an inhomogeneous linewidth as low as 150 MHz over three minutes. Excitation power and energy-dependent measurements in combination with nanoscopic Monte Carlo simulations contribute to a better understanding of the impact of bulk and surface defects on the NV’s spectral properties. Finally, we propose an entanglement protocol for nanostructure-coupled NVs providing entanglement generation rates up to hundreds of kHz.},
	number = {1},
	urldate = {2023-04-17},
	journal = {Physical Review X},
	author = {Orphal-Kobin, Laura and Unterguggenberger, Kilian and Pregnolato, Tommaso and Kemf, Natalia and Matalla, Mathias and Unger, Ralph-Stephan and Ostermay, Ina and Pieplow, Gregor and Schröder, Tim},
	month = mar,
	year = {2023},
	note = {Publisher: American Physical Society},
	pages = {011042},
}



@article{smallwood_hidden_2021,
	title = {Hidden {Silicon}-{Vacancy} {Centers} in {Diamond}},
	volume = {126},
	url = {https://link.aps.org/doi/10.1103/PhysRevLett.126.213601},
	doi = {10.1103/PhysRevLett.126.213601},
	abstract = {We characterize a high-density sample of negatively charged silicon-vacancy (SiV−) centers in diamond using collinear optical multidimensional coherent spectroscopy. By comparing the results of complementary signal detection schemes, we identify a hidden population of SiV− centers that is not typically observed in photoluminescence and which exhibits significant spectral inhomogeneity and extended electronic T2 times. The phenomenon is likely caused by strain, indicating a potential mechanism for controlling electric coherence in color-center-based quantum devices.},
	number = {21},
	urldate = {2022-08-03},
	journal = {Physical Review Letters},
	author = {Smallwood, Christopher L. and Ulbricht, Ronald and Day, Matthew W. and Schröder, Tim and Bates, Kelsey M. and Autry, Travis M. and Diederich, Geoffrey and Bielejec, Edward and Siemens, Mark E. and Cundiff, Steven T.},
	month = may,
	year = {2021},
	note = {Publisher: American Physical Society},
	pages = {213601},
}



@article{torun_optimized_2021,
	title = {Optimized diamond inverted nanocones for enhanced color center to fiber coupling},
	volume = {118},
	issn = {0003-6951},
	url = {https://aip.scitation.org/doi/full/10.1063/5.0050338},
	doi = {10.1063/5.0050338},
	abstract = {Nanostructures can be used for boosting the light outcoupling of color centers in diamond; however, the fiber coupling performance of these nanostructures is rarely investigated. Here, we use a finite element method for computing the emission from color centers in inverted nanocones and the overlap of this emission with the propagation mode in a single-mode fiber. Using different figures of merit, the inverted nanocone parameters are optimized to obtain maximal fiber coupling efficiency, free-space collection efficiency, or rate enhancement. The optimized inverted nanocone designs show promising results with 66\% fiber coupling or 83\% free-space coupling efficiency at the tin-vacancy center zero-phonon line wavelength of 619 nm. Moreover, when evaluated for broadband performance, the optimized designs show 55\% and 76\% for fiber coupling and free-space efficiencies, respectively, for collecting the full tin-vacancy emission spectrum at room temperature. An analysis of fabrication insensitivity indicates that these nanostructures are robust against imperfections. For maximum emission rate into a fiber mode, a design with a Purcell factor of 2.34 is identified. Finally, possible improvements offered by a hybrid inverted nanocone, formed by patterning into two different materials, are investigated and increase the achievable fiber coupling efficiency to 71\%.},
	number = {23},
	urldate = {2021-10-03},
	journal = {Applied Physics Letters},
	author = {Torun, Cem Güney and Schneider, Philipp-Immanuel and Hammerschmidt, Martin and Burger, Sven and Munns, Joseph H. D. and Schröder, Tim},
	month = jun,
	year = {2021},
	note = {Publisher: American Institute of Physics},
	pages = {234002},
}
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By periodically reversing the probing system&#x27;s evolution, other noises are counteracted and filtered out over the total evolution. However, the technique is subject to intricate interactions resulting in additional resonant responses, which can be misinterpreted with the actual signal intended to be measured. We experimentally characterized three of these effects present in single nitrogen vacancy centers in diamond, where we also developed a numerical simulations model without rotating wave approximations, showing robust correlation to the experimental data. Regarding centers with the \\${\\textasciicircum}\\{15\\}\\$N nitrogen isotope, we observed that a small misalignment in the bias magnetic field causes the precession of the nitrogen nuclear spin to be sensed by the electronic spin of the center. Another studied case of ambiguous resonances comes from the coupling with lattice \\${\\textasciicircum}\\{13\\}\\$C nuclei, where we reconstructed the interaction Hamiltonian based on echo modulation frequencies and used this Hamiltonian to simulate multipulse sequences. Finally, we also measured and simulated the effects from the free evolution of the quantum system during finite pulse durations. Due to the large data volume and the strong dependency of these ambiguous resonances with specific experimental parameters, we provide a simulations dataset with a user-friendly graphical interface, where users can compare simulations with their own experimental data for spectral disambiguation. Although focused with nitrogen vacancy centers and dynamical decoupling sequences, these results and the developed model can potentially be applied to other solid state spins and quantum sensing techniques.},\n\turldate = {2024-07-26},\n\tpublisher = {arXiv},\n\tauthor = {Tsunaki, Lucas and Singh, Anmol and Volkova, Kseniia and Trofimov, Sergei and Pregnolato, Tommaso and Schröder, Tim and Naydenov, Boris},\n\tmonth = jul,\n\tyear = {2024},\n\tnote = {arXiv:2407.09411 [cond-mat, physics:quant-ph]},\n\tkeywords = {Condensed Matter - Other Condensed Matter, Quantum Physics},\n}\n\n</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" data-type=\"abstract\"\n     style=\"display:none\">\n  Dynamical decoupling multipulse sequences can be applied to solid state spins for sensing weak oscillating fields from nearby single nuclear spins. By periodically reversing the probing system's evolution, other noises are counteracted and filtered out over the total evolution. However, the technique is subject to intricate interactions resulting in additional resonant responses, which can be misinterpreted with the actual signal intended to be measured. We experimentally characterized three of these effects present in single nitrogen vacancy centers in diamond, where we also developed a numerical simulations model without rotating wave approximations, showing robust correlation to the experimental data. Regarding centers with the ${\\textasciicircum}\\{15\\}$N nitrogen isotope, we observed that a small misalignment in the bias magnetic field causes the precession of the nitrogen nuclear spin to be sensed by the electronic spin of the center. Another studied case of ambiguous resonances comes from the coupling with lattice ${\\textasciicircum}\\{13\\}$C nuclei, where we reconstructed the interaction Hamiltonian based on echo modulation frequencies and used this Hamiltonian to simulate multipulse sequences. Finally, we also measured and simulated the effects from the free evolution of the quantum system during finite pulse durations. Due to the large data volume and the strong dependency of these ambiguous resonances with specific experimental parameters, we provide a simulations dataset with a user-friendly graphical interface, where users can compare simulations with their own experimental data for spectral disambiguation. Although focused with nitrogen vacancy centers and dynamical decoupling sequences, these results and the developed model can potentially be applied to other solid state spins and quantum sensing techniques.\n</div>\n\n\n</div>\n\n\n  <div class=\"bibbase_paper\" id=\"wiesner-chrzanowski-pieplow-schrder-pappa-wolters-theinfluenceofexperimentalimperfectionsonphotonicghzstategeneration-2024\">\n  <span class=\"bibbase_paper_titleauthoryear\">\n\n  \n  <span class=\"bibbase_paper_title\">\n  \n  \n  \n  <a href=\"http://arxiv.org/abs/2406.18257\"\n     onclick=\"return trackOutboundLink('publications', 'click', 'wiesner-chrzanowski-pieplow-schrder-pappa-wolters-theinfluenceofexperimentalimperfectionsonphotonicghzstategeneration-2024', 'http://arxiv.org/abs/2406.18257', event);\">\n    The Influence of Experimental Imperfections on Photonic GHZ State Generation.\n  </a>\n  \n  \n  \n</span>\n\n  <span class=\"bibbase_paper_author\">\n  Wiesner, F.; Chrzanowski, H. M.; Pieplow, G.; <a class=\"bibbase author link\" href=\"https://www.physik.hu-berlin.de/en/iqp/publications\">Schröder, T.</a>; Pappa, A.;  and Wolters, J.\n</span>\n\n  \n\n</span>\n\n  June 2024.\n  <span class=\"note\">arXiv:2406.18257 [quant-ph]</span>\n\n<span class=\"bibbase_note\"></span>\n\n<br class=\"bibbase_paper_content\"/>\n\n<span class=\"bibbase_paper_content dontprint\">\n\n  \n  <a href=\"http://arxiv.org/abs/2406.18257\"\n     onclick=\"log_download('wiesner-chrzanowski-pieplow-schrder-pappa-wolters-theinfluenceofexperimentalimperfectionsonphotonicghzstategeneration-2024', 'http://arxiv.org/abs/2406.18257', event.ctrlKey, event)\">\n    <img src=\"//bibbase.org/img/filetypes/link.svg\"\n\t     alt=\"The Influence of Experimental Imperfections on Photonic GHZ State Generation [link]\"\n       title=\"Paper\"\n\t     class=\"bibbase_icon\"\n         ><span class=\"bibbase_icon_text\">Paper</span></a>\n  &nbsp;\n  \n\n  \n\n  \n  <a href=\"//bibbase.org/network/publication/wiesner-chrzanowski-pieplow-schrder-pappa-wolters-theinfluenceofexperimentalimperfectionsonphotonicghzstategeneration-2024\"\n     class=\"bibbase bibbase_page link\">link</a>\n  &nbsp;\n  \n\n  <a href=\"#\"\n     onclick=\"showBib(event); return false;\"\n     class=\"bibbase bibtex link\">bibtex\n    <i class=\"fa fa-caret-down\"></i></a>\n\n  \n  &nbsp;\n  <a class=\"bibbase_abstract_link bibbase link\"\n     href=\"#\"\n     onclick=\"showAbstract(event); return false;\">\n    abstract <i class=\"fa fa-caret-down\"></i></a>\n  \n\n  \n  &nbsp;\n  <span class=\"bibbase_stats_paper\" style=\"color: #777;\">\n    <span>3 downloads</span>\n  </span>\n  \n\n  <!-- <a class=\"bibbase read link hidden\" -->\n  <!--    href=\"javascript:toggleRead('wiesner-chrzanowski-pieplow-schrder-pappa-wolters-theinfluenceofexperimentalimperfectionsonphotonicghzstategeneration-2024')\" -->\n  <!--    title=\"Marking this paper as read adds it to your library on BibBase.\" -->\n  <!--    > -->\n  <!--   <i class=\"fa fa-check\"></i>&nbsp; -->\n  <!--   <span>mark as read</span> -->\n  <!-- </a> -->\n\n  &nbsp;\n  \n  \n\n</span>\n\n<div class=\"well well-small bibbase\" data-type=\"bibtex\"\n     style=\"display:none\">\n  <pre style=\"white-space: pre-wrap;\">@misc{wiesner_influence_2024,\n\ttitle = {The {Influence} of {Experimental} {Imperfections} on {Photonic} {GHZ} {State} {Generation}},\n\turl = {http://arxiv.org/abs/2406.18257},\n\tabstract = {While the advantages of photonic quantum computing, including direct compatibility with communication, are apparent, several imperfections such as loss and distinguishability presently limit actual implementations. These imperfections are unlikely to be completely eliminated, and it is therefore beneficial to investigate which of these are the most dominant and what is achievable under their presence. In this work, we provide an in-depth investigation of the influence of photon loss, multi-photon terms and photon distinguishability on the generation of photonic 3-partite GHZ states via established fusion protocols. We simulate the generation process for SPDC and solid-state-based single-photon sources using realistic parameters and show that different types of imperfections are dominant with respect to the fidelity and generation success probability. Our results indicate what are the dominant imperfections for the different photon sources and in which parameter regimes we can hope to implement photonic quantum computing in the near future.},\n\turldate = {2024-07-01},\n\tauthor = {Wiesner, Fabian and Chrzanowski, Helen M. and Pieplow, Gregor and Schröder, Tim and Pappa, Anna and Wolters, Janik},\n\tmonth = jun,\n\tyear = {2024},\n\tnote = {arXiv:2406.18257 [quant-ph]},\n}\n\n</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" data-type=\"abstract\"\n     style=\"display:none\">\n  While the advantages of photonic quantum computing, including direct compatibility with communication, are apparent, several imperfections such as loss and distinguishability presently limit actual implementations. These imperfections are unlikely to be completely eliminated, and it is therefore beneficial to investigate which of these are the most dominant and what is achievable under their presence. In this work, we provide an in-depth investigation of the influence of photon loss, multi-photon terms and photon distinguishability on the generation of photonic 3-partite GHZ states via established fusion protocols. We simulate the generation process for SPDC and solid-state-based single-photon sources using realistic parameters and show that different types of imperfections are dominant with respect to the fidelity and generation success probability. Our results indicate what are the dominant imperfections for the different photon sources and in which parameter regimes we can hope to implement photonic quantum computing in the near future.\n</div>\n\n\n</div>\n\n\n  <div class=\"bibbase_paper\" id=\"orphalkobin-torun-bopp-pieplow-schrder-coherentmicrowaveopticalandmechanicalquantumcontrolofspinqubitsindiamond-2024\">\n  <span class=\"bibbase_paper_titleauthoryear\">\n\n  \n  <span class=\"bibbase_paper_title\">\n  \n  \n  \n  <a href=\"https://onlinelibrary.wiley.com/doi/10.1002/qute.202300432\"\n     onclick=\"return trackOutboundLink('publications', 'click', 'orphalkobin-torun-bopp-pieplow-schrder-coherentmicrowaveopticalandmechanicalquantumcontrolofspinqubitsindiamond-2024', 'https://onlinelibrary.wiley.com/doi/10.1002/qute.202300432', event);\">\n    Coherent Microwave, Optical, and Mechanical Quantum Control of Spin Qubits in Diamond.\n  </a>\n  \n  \n  \n</span>\n\n  <span class=\"bibbase_paper_author\">\n  Orphal‐Kobin, L.; Torun, C. G.; Bopp, J. M.; Pieplow, G.;  and <a class=\"bibbase author link\" href=\"https://www.physik.hu-berlin.de/en/iqp/publications\">Schröder, T.</a>\n</span>\n\n  \n\n</span>\n\n  <i>Advanced Quantum Technologies</i>,2300432. May 2024.\n  <span class=\"note\"></span>\n\n<span class=\"bibbase_note\"></span>\n\n<br class=\"bibbase_paper_content\"/>\n\n<span class=\"bibbase_paper_content dontprint\">\n\n  \n  <a href=\"https://onlinelibrary.wiley.com/doi/10.1002/qute.202300432\"\n     onclick=\"log_download('orphalkobin-torun-bopp-pieplow-schrder-coherentmicrowaveopticalandmechanicalquantumcontrolofspinqubitsindiamond-2024', 'https://onlinelibrary.wiley.com/doi/10.1002/qute.202300432', event.ctrlKey, event)\">\n    <img src=\"//bibbase.org/img/filetypes/link.svg\"\n\t     alt=\"Coherent Microwave, Optical, and Mechanical Quantum Control of Spin Qubits in Diamond [link]\"\n       title=\"Paper\"\n\t     class=\"bibbase_icon\"\n         ><span class=\"bibbase_icon_text\">Paper</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"http://doi.org/10.1002/qute.202300432\"\n     onclick=\"log_download('orphalkobin-torun-bopp-pieplow-schrder-coherentmicrowaveopticalandmechanicalquantumcontrolofspinqubitsindiamond-2024', 'http://doi.org/10.1002/qute.202300432', event.ctrlKey)\"\n     class=\"bibbase doi link\">\n    <span>doi</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"//bibbase.org/network/publication/orphalkobin-torun-bopp-pieplow-schrder-coherentmicrowaveopticalandmechanicalquantumcontrolofspinqubitsindiamond-2024\"\n     class=\"bibbase bibbase_page link\">link</a>\n  &nbsp;\n  \n\n  <a href=\"#\"\n     onclick=\"showBib(event); return false;\"\n     class=\"bibbase bibtex link\">bibtex\n    <i class=\"fa fa-caret-down\"></i></a>\n\n  \n  &nbsp;\n  <a class=\"bibbase_abstract_link bibbase link\"\n     href=\"#\"\n     onclick=\"showAbstract(event); return false;\">\n    abstract <i class=\"fa fa-caret-down\"></i></a>\n  \n\n  \n  &nbsp;\n  <span class=\"bibbase_stats_paper\" style=\"color: #777;\">\n    <span>3 downloads</span>\n  </span>\n  \n\n  <!-- <a class=\"bibbase read link hidden\" -->\n  <!--    href=\"javascript:toggleRead('orphalkobin-torun-bopp-pieplow-schrder-coherentmicrowaveopticalandmechanicalquantumcontrolofspinqubitsindiamond-2024')\" -->\n  <!--    title=\"Marking this paper as read adds it to your library on BibBase.\" -->\n  <!--    > -->\n  <!--   <i class=\"fa fa-check\"></i>&nbsp; -->\n  <!--   <span>mark as read</span> -->\n  <!-- </a> -->\n\n  &nbsp;\n  \n  \n\n</span>\n\n<div class=\"well well-small bibbase\" data-type=\"bibtex\"\n     style=\"display:none\">\n  <pre style=\"white-space: pre-wrap;\">@article{orphalkobin_coherent_2024,\n\ttitle = {Coherent {Microwave}, {Optical}, and {Mechanical} {Quantum} {Control} of {Spin} {Qubits} in {Diamond}},\n\tissn = {2511-9044, 2511-9044},\n\turl = {https://onlinelibrary.wiley.com/doi/10.1002/qute.202300432},\n\tdoi = {10.1002/qute.202300432},\n\tabstract = {Abstract\n            Diamond has emerged as a highly promising platform for quantum network applications. Color centers in diamond fulfill the fundamental requirements for quantum nodes: they constitute optically accessible quantum systems with long‐lived spin qubits. Furthermore, they provide access to a quantum register of electronic and nuclear spin qubits and they mediate entanglement between spins and photons. All these operations require coherent control of the color center&#x27;s spin state. This review provides a comprehensive overview of the state‐of‐the‐art, challenges, and prospects of such schemes, including high‐fidelity initialization, coherent manipulation, and readout of spin states. Established microwave and optical control techniques are reviewed, and moreover, emerging methods such as cavity‐mediated spin–photon interactions and mechanical control based on spin–phonon interactions are summarized. For different types of color centers, namely, nitrogen–vacancy and group‐IV color centers, distinct challenges persist that are subject of ongoing research. Beyond fundamental coherent spin qubit control techniques, advanced demonstrations in quantum network applications are outlined, for example, the integration of individual color centers for accessing (nuclear) multiqubit registers. Finally, the role of diamond spin qubits in the realization of future quantum information applications is described.},\n\tlanguage = {en},\n\turldate = {2024-05-17},\n\tjournal = {Advanced Quantum Technologies},\n\tauthor = {Orphal‐Kobin, Laura and Torun, Cem Güney and Bopp, Julian M. and Pieplow, Gregor and Schröder, Tim},\n\tmonth = may,\n\tyear = {2024},\n\tpages = {2300432},\n}\n\n</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" data-type=\"abstract\"\n     style=\"display:none\">\n  Abstract Diamond has emerged as a highly promising platform for quantum network applications. Color centers in diamond fulfill the fundamental requirements for quantum nodes: they constitute optically accessible quantum systems with long‐lived spin qubits. Furthermore, they provide access to a quantum register of electronic and nuclear spin qubits and they mediate entanglement between spins and photons. All these operations require coherent control of the color center's spin state. This review provides a comprehensive overview of the state‐of‐the‐art, challenges, and prospects of such schemes, including high‐fidelity initialization, coherent manipulation, and readout of spin states. Established microwave and optical control techniques are reviewed, and moreover, emerging methods such as cavity‐mediated spin–photon interactions and mechanical control based on spin–phonon interactions are summarized. For different types of color centers, namely, nitrogen–vacancy and group‐IV color centers, distinct challenges persist that are subject of ongoing research. Beyond fundamental coherent spin qubit control techniques, advanced demonstrations in quantum network applications are outlined, for example, the integration of individual color centers for accessing (nuclear) multiqubit registers. Finally, the role of diamond spin qubits in the realization of future quantum information applications is described.\n</div>\n\n\n</div>\n\n\n  <div class=\"bibbase_paper\" id=\"pieplow-torun-munns-herrmann-thies-pregnolato-schrder-quantumelectrometerfortimeresolvedmaterialscienceattheatomiclatticescale-2024\">\n  <span class=\"bibbase_paper_titleauthoryear\">\n\n  \n  <span class=\"bibbase_paper_title\">\n  \n  \n  \n  <a href=\"http://arxiv.org/abs/2401.14290\"\n     onclick=\"return trackOutboundLink('publications', 'click', 'pieplow-torun-munns-herrmann-thies-pregnolato-schrder-quantumelectrometerfortimeresolvedmaterialscienceattheatomiclatticescale-2024', 'http://arxiv.org/abs/2401.14290', event);\">\n    Quantum Electrometer for Time-Resolved Material Science at the Atomic Lattice Scale.\n  </a>\n  \n  \n  \n</span>\n\n  <span class=\"bibbase_paper_author\">\n  Pieplow, G.; Torun, C. G.; Munns, J. H. D.; Herrmann, F. M.; Thies, A.; Pregnolato, T.;  and <a class=\"bibbase author link\" href=\"https://www.physik.hu-berlin.de/en/iqp/publications\">Schröder, T.</a>\n</span>\n\n  \n\n</span>\n\n  January 2024.\n  <span class=\"note\">arXiv:2401.14290 [cond-mat, physics:physics, physics:quant-ph]</span>\n\n<span class=\"bibbase_note\"></span>\n\n<br class=\"bibbase_paper_content\"/>\n\n<span class=\"bibbase_paper_content dontprint\">\n\n  \n  <a href=\"http://arxiv.org/abs/2401.14290\"\n     onclick=\"log_download('pieplow-torun-munns-herrmann-thies-pregnolato-schrder-quantumelectrometerfortimeresolvedmaterialscienceattheatomiclatticescale-2024', 'http://arxiv.org/abs/2401.14290', event.ctrlKey, event)\">\n    <img src=\"//bibbase.org/img/filetypes/link.svg\"\n\t     alt=\"Quantum Electrometer for Time-Resolved Material Science at the Atomic Lattice Scale [link]\"\n       title=\"Paper\"\n\t     class=\"bibbase_icon\"\n         ><span class=\"bibbase_icon_text\">Paper</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"http://doi.org/10.48550/arXiv.2401.14290\"\n     onclick=\"log_download('pieplow-torun-munns-herrmann-thies-pregnolato-schrder-quantumelectrometerfortimeresolvedmaterialscienceattheatomiclatticescale-2024', 'http://doi.org/10.48550/arXiv.2401.14290', event.ctrlKey)\"\n     class=\"bibbase doi link\">\n    <span>doi</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"//bibbase.org/network/publication/pieplow-torun-munns-herrmann-thies-pregnolato-schrder-quantumelectrometerfortimeresolvedmaterialscienceattheatomiclatticescale-2024\"\n     class=\"bibbase bibbase_page link\">link</a>\n  &nbsp;\n  \n\n  <a href=\"#\"\n     onclick=\"showBib(event); return false;\"\n     class=\"bibbase bibtex link\">bibtex\n    <i class=\"fa fa-caret-down\"></i></a>\n\n  \n  &nbsp;\n  <a class=\"bibbase_abstract_link bibbase link\"\n     href=\"#\"\n     onclick=\"showAbstract(event); return false;\">\n    abstract <i class=\"fa fa-caret-down\"></i></a>\n  \n\n  \n  &nbsp;\n  <span class=\"bibbase_stats_paper\" style=\"color: #777;\">\n    <span>1 download</span>\n  </span>\n  \n\n  <!-- <a class=\"bibbase read link hidden\" -->\n  <!--    href=\"javascript:toggleRead('pieplow-torun-munns-herrmann-thies-pregnolato-schrder-quantumelectrometerfortimeresolvedmaterialscienceattheatomiclatticescale-2024')\" -->\n  <!--    title=\"Marking this paper as read adds it to your library on BibBase.\" -->\n  <!--    > -->\n  <!--   <i class=\"fa fa-check\"></i>&nbsp; -->\n  <!--   <span>mark as read</span> -->\n  <!-- </a> -->\n\n  &nbsp;\n  \n  \n  \n  \n  \n  \n  \n  \n\n</span>\n\n<div class=\"well well-small bibbase\" data-type=\"bibtex\"\n     style=\"display:none\">\n  <pre style=\"white-space: pre-wrap;\">@misc{pieplow_quantum_2024,\n\ttitle = {Quantum {Electrometer} for {Time}-{Resolved} {Material} {Science} at the {Atomic} {Lattice} {Scale}},\n\turl = {http://arxiv.org/abs/2401.14290},\n\tdoi = {10.48550/arXiv.2401.14290},\n\tabstract = {The detection of individual charges plays a crucial role in fundamental material science and the advancement of classical and quantum high-performance technologies that operate with low noise. However, resolving charges at the lattice scale in a time-resolved manner has not been achieved so far. Here, we present the development of an electrometer, leveraging on the spectroscopy of an optically-active spin defect embedded in a solid-state material with a non-linear Stark response. By applying our approach to diamond, a widely used platform for quantum technology applications, we successfully localize charge traps, quantify their impact on transport dynamics and noise generation, analyze relevant material properties, and develop strategies for material optimization.},\n\turldate = {2024-04-10},\n\tauthor = {Pieplow, Gregor and Torun, Cem Güney and Munns, Joseph H. D. and Herrmann, Franziska Marie and Thies, Andreas and Pregnolato, Tommaso and Schröder, Tim},\n\tmonth = jan,\n\tyear = {2024},\n\tnote = {arXiv:2401.14290 [cond-mat, physics:physics, physics:quant-ph]},\n\tkeywords = {Condensed Matter - Materials Science, Physics - Applied Physics, Quantum Physics},\n}\n\n</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" data-type=\"abstract\"\n     style=\"display:none\">\n  The detection of individual charges plays a crucial role in fundamental material science and the advancement of classical and quantum high-performance technologies that operate with low noise. However, resolving charges at the lattice scale in a time-resolved manner has not been achieved so far. Here, we present the development of an electrometer, leveraging on the spectroscopy of an optically-active spin defect embedded in a solid-state material with a non-linear Stark response. By applying our approach to diamond, a widely used platform for quantum technology applications, we successfully localize charge traps, quantify their impact on transport dynamics and noise generation, analyze relevant material properties, and develop strategies for material optimization.\n</div>\n\n\n</div>\n\n\n  <div class=\"bibbase_paper\" id=\"pregnolato-stucki-bopp-vdhoeven-gokhale-krger-schrder-fabricationofsawfishphotoniccrystalcavitiesinbulkdiamond-2024\">\n  <span class=\"bibbase_paper_titleauthoryear\">\n\n  \n  <span class=\"bibbase_paper_title\">\n  \n  \n  \n  <a href=\"https://doi.org/10.1063/5.0186509\"\n     onclick=\"return trackOutboundLink('publications', 'click', 'pregnolato-stucki-bopp-vdhoeven-gokhale-krger-schrder-fabricationofsawfishphotoniccrystalcavitiesinbulkdiamond-2024', 'https://doi.org/10.1063/5.0186509', event);\">\n    Fabrication of Sawfish photonic crystal cavities in bulk diamond.\n  </a>\n  \n  \n  \n</span>\n\n  <span class=\"bibbase_paper_author\">\n  Pregnolato, T.; Stucki, M. E.; Bopp, J. M.; v. d. Hoeven, M. H.; Gokhale, A.; Krüger, O.;  and <a class=\"bibbase author link\" href=\"https://www.physik.hu-berlin.de/en/iqp/publications\">Schröder, T.</a>\n</span>\n\n  \n\n</span>\n\n  <i>APL Photonics</i>, 9(3): 036105. March 2024.\n  <span class=\"note\"></span>\n\n<span class=\"bibbase_note\"></span>\n\n<br class=\"bibbase_paper_content\"/>\n\n<span class=\"bibbase_paper_content dontprint\">\n\n  \n  <a href=\"https://doi.org/10.1063/5.0186509\"\n     onclick=\"log_download('pregnolato-stucki-bopp-vdhoeven-gokhale-krger-schrder-fabricationofsawfishphotoniccrystalcavitiesinbulkdiamond-2024', 'https://doi.org/10.1063/5.0186509', event.ctrlKey, event)\">\n    <img src=\"//bibbase.org/img/filetypes/link.svg\"\n\t     alt=\"Fabrication of Sawfish photonic crystal cavities in bulk diamond [link]\"\n       title=\"Paper\"\n\t     class=\"bibbase_icon\"\n         ><span class=\"bibbase_icon_text\">Paper</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"http://doi.org/10.1063/5.0186509\"\n     onclick=\"log_download('pregnolato-stucki-bopp-vdhoeven-gokhale-krger-schrder-fabricationofsawfishphotoniccrystalcavitiesinbulkdiamond-2024', 'http://doi.org/10.1063/5.0186509', event.ctrlKey)\"\n     class=\"bibbase doi link\">\n    <span>doi</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"//bibbase.org/network/publication/pregnolato-stucki-bopp-vdhoeven-gokhale-krger-schrder-fabricationofsawfishphotoniccrystalcavitiesinbulkdiamond-2024\"\n     class=\"bibbase bibbase_page link\">link</a>\n  &nbsp;\n  \n\n  <a href=\"#\"\n     onclick=\"showBib(event); return false;\"\n     class=\"bibbase bibtex link\">bibtex\n    <i class=\"fa fa-caret-down\"></i></a>\n\n  \n  &nbsp;\n  <a class=\"bibbase_abstract_link bibbase link\"\n     href=\"#\"\n     onclick=\"showAbstract(event); return false;\">\n    abstract <i class=\"fa fa-caret-down\"></i></a>\n  \n\n  \n  &nbsp;\n  <span class=\"bibbase_stats_paper\" style=\"color: #777;\">\n    <span>4 downloads</span>\n  </span>\n  \n\n  <!-- <a class=\"bibbase read link hidden\" -->\n  <!--    href=\"javascript:toggleRead('pregnolato-stucki-bopp-vdhoeven-gokhale-krger-schrder-fabricationofsawfishphotoniccrystalcavitiesinbulkdiamond-2024')\" -->\n  <!--    title=\"Marking this paper as read adds it to your library on BibBase.\" -->\n  <!--    > -->\n  <!--   <i class=\"fa fa-check\"></i>&nbsp; -->\n  <!--   <span>mark as read</span> -->\n  <!-- </a> -->\n\n  &nbsp;\n  \n  \n\n</span>\n\n<div class=\"well well-small bibbase\" data-type=\"bibtex\"\n     style=\"display:none\">\n  <pre style=\"white-space: pre-wrap;\">@article{pregnolato_fabrication_2024,\n\ttitle = {Fabrication of {Sawfish} photonic crystal cavities in bulk diamond},\n\tvolume = {9},\n\tissn = {2378-0967},\n\turl = {https://doi.org/10.1063/5.0186509},\n\tdoi = {10.1063/5.0186509},\n\tabstract = {Color centers in diamonds are quantum systems with optically active spin-states that show long coherence times and are, therefore, a promising candidate for the development of efficient spin–photon interfaces. However, only a small portion of the emitted photons is generated by the coherent optical transition of the zero-phonon line (ZPL), which limits the overall performance of the system. Embedding these emitters in photonic crystal cavities improves the coupling to the ZPL photons and increases their emission rate. Here, we demonstrate the fabrication process of “Sawfish” cavities, a design recently proposed that has the experimentally realistic potential to simultaneously provide a high waveguide coupling efficiency and significantly enhance the emission rate. The presented process allows for the fabrication of fully suspended devices with a total length of 20.5 μm and feature sizes as small as 40 nm. The optical characterization shows fundamental mode resonances that follow the behavior expected from the corresponding design parameters and quality (Q) factors as high as (3800 ± 1200). Finally, we investigate the effects of nanofabrication on the devices and show that, despite a noticeable erosion of the fine features, the measured cavity resonances deviate by only 0.8 (1.2)\\% from the values estimated by simple inspection via scanning electron microscopy. This proves that the Sawfish design is robust against fabrication imperfections, which makes it an attractive choice for the development of quantum photonic networks.},\n\tnumber = {3},\n\turldate = {2024-03-08},\n\tjournal = {APL Photonics},\n\tauthor = {Pregnolato, Tommaso and Stucki, Marco E. and Bopp, Julian M. and v. d. Hoeven, Maarten H. and Gokhale, Alok and Krüger, Olaf and Schröder, Tim},\n\tmonth = mar,\n\tyear = {2024},\n\tpages = {036105},\n}\n\n</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" data-type=\"abstract\"\n     style=\"display:none\">\n  Color centers in diamonds are quantum systems with optically active spin-states that show long coherence times and are, therefore, a promising candidate for the development of efficient spin–photon interfaces. However, only a small portion of the emitted photons is generated by the coherent optical transition of the zero-phonon line (ZPL), which limits the overall performance of the system. Embedding these emitters in photonic crystal cavities improves the coupling to the ZPL photons and increases their emission rate. Here, we demonstrate the fabrication process of “Sawfish” cavities, a design recently proposed that has the experimentally realistic potential to simultaneously provide a high waveguide coupling efficiency and significantly enhance the emission rate. The presented process allows for the fabrication of fully suspended devices with a total length of 20.5 μm and feature sizes as small as 40 nm. The optical characterization shows fundamental mode resonances that follow the behavior expected from the corresponding design parameters and quality (Q) factors as high as (3800 ± 1200). Finally, we investigate the effects of nanofabrication on the devices and show that, despite a noticeable erosion of the fine features, the measured cavity resonances deviate by only 0.8 (1.2)% from the values estimated by simple inspection via scanning electron microscopy. This proves that the Sawfish design is robust against fabrication imperfections, which makes it an attractive choice for the development of quantum photonic networks.\n</div>\n\n\n</div>\n\n\n  <div class=\"bibbase_paper\" id=\"pieplow-belhassen-schrder-efficientmicrowavespincontrolofnegativelychargedgroupivcolorcentersindiamond-2024\">\n  <span class=\"bibbase_paper_titleauthoryear\">\n\n  \n  <span class=\"bibbase_paper_title\">\n  \n  \n  \n  <a href=\"https://link.aps.org/doi/10.1103/PhysRevB.109.115409\"\n     onclick=\"return trackOutboundLink('publications', 'click', 'pieplow-belhassen-schrder-efficientmicrowavespincontrolofnegativelychargedgroupivcolorcentersindiamond-2024', 'https://link.aps.org/doi/10.1103/PhysRevB.109.115409', event);\">\n    Efficient microwave spin control of negatively charged group-IV color centers in diamond.\n  </a>\n  \n  \n  \n</span>\n\n  <span class=\"bibbase_paper_author\">\n  Pieplow, G.; Belhassen, M.;  and <a class=\"bibbase author link\" href=\"https://www.physik.hu-berlin.de/en/iqp/publications\">Schröder, T.</a>\n</span>\n\n  \n\n</span>\n\n  <i>Physical Review B</i>, 109(11): 115409. March 2024.\n  <span class=\"note\">Publisher: American Physical Society</span>\n\n<span class=\"bibbase_note\"></span>\n\n<br class=\"bibbase_paper_content\"/>\n\n<span class=\"bibbase_paper_content dontprint\">\n\n  \n  <a href=\"https://link.aps.org/doi/10.1103/PhysRevB.109.115409\"\n     onclick=\"log_download('pieplow-belhassen-schrder-efficientmicrowavespincontrolofnegativelychargedgroupivcolorcentersindiamond-2024', 'https://link.aps.org/doi/10.1103/PhysRevB.109.115409', event.ctrlKey, event)\">\n    <img src=\"//bibbase.org/img/filetypes/link.svg\"\n\t     alt=\"Efficient microwave spin control of negatively charged group-IV color centers in diamond [link]\"\n       title=\"Paper\"\n\t     class=\"bibbase_icon\"\n         ><span class=\"bibbase_icon_text\">Paper</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"http://doi.org/10.1103/PhysRevB.109.115409\"\n     onclick=\"log_download('pieplow-belhassen-schrder-efficientmicrowavespincontrolofnegativelychargedgroupivcolorcentersindiamond-2024', 'http://doi.org/10.1103/PhysRevB.109.115409', event.ctrlKey)\"\n     class=\"bibbase doi link\">\n    <span>doi</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"//bibbase.org/network/publication/pieplow-belhassen-schrder-efficientmicrowavespincontrolofnegativelychargedgroupivcolorcentersindiamond-2024\"\n     class=\"bibbase bibbase_page link\">link</a>\n  &nbsp;\n  \n\n  <a href=\"#\"\n     onclick=\"showBib(event); return false;\"\n     class=\"bibbase bibtex link\">bibtex\n    <i class=\"fa fa-caret-down\"></i></a>\n\n  \n  &nbsp;\n  <a class=\"bibbase_abstract_link bibbase link\"\n     href=\"#\"\n     onclick=\"showAbstract(event); return false;\">\n    abstract <i class=\"fa fa-caret-down\"></i></a>\n  \n\n  \n  &nbsp;\n  <span class=\"bibbase_stats_paper\" style=\"color: #777;\">\n    <span>3 downloads</span>\n  </span>\n  \n\n  <!-- <a class=\"bibbase read link hidden\" -->\n  <!--    href=\"javascript:toggleRead('pieplow-belhassen-schrder-efficientmicrowavespincontrolofnegativelychargedgroupivcolorcentersindiamond-2024')\" -->\n  <!--    title=\"Marking this paper as read adds it to your library on BibBase.\" -->\n  <!--    > -->\n  <!--   <i class=\"fa fa-check\"></i>&nbsp; -->\n  <!--   <span>mark as read</span> -->\n  <!-- </a> -->\n\n  &nbsp;\n  \n  \n\n</span>\n\n<div class=\"well well-small bibbase\" data-type=\"bibtex\"\n     style=\"display:none\">\n  <pre style=\"white-space: pre-wrap;\">@article{pieplow_efficient_2024,\n\ttitle = {Efficient microwave spin control of negatively charged group-{IV} color centers in diamond},\n\tvolume = {109},\n\turl = {https://link.aps.org/doi/10.1103/PhysRevB.109.115409},\n\tdoi = {10.1103/PhysRevB.109.115409},\n\tabstract = {In this paper, we provide a comprehensive overview of the microwave-induced manipulation of electronic spin states in negatively charged group-IV color centers in diamond with a particular emphasis on the influence of strain. Central to our investigation is the consideration of the full vectorial attributes of the magnetic fields involved, which are a dc field for lifting the degeneracy of the spin levels and an ac field for microwave control between two spin levels. We observe an intricate interdependence between their spatial orientations, the externally applied strain, and the resultant efficacy in spin-state control. In most studies to date the ac and dc magnetic field orientations have been insufficiently addressed, which has led to the conclusion that strain is indispensable for the effective microwave control of heavier group-IV vacancies, such as tin- and lead-vacancy color centers. In contrast, we find that the alignment of the dc magnetic field orthogonal to the symmetry axis and the ac field parallel to it can make the application of strain obsolete for effective spin manipulation. Furthermore, we explore the implications of this field configuration on the spin&#x27;s optical initialization, readout, and gate fidelities.},\n\tnumber = {11},\n\turldate = {2024-03-08},\n\tjournal = {Physical Review B},\n\tauthor = {Pieplow, Gregor and Belhassen, Mohamed and Schröder, Tim},\n\tmonth = mar,\n\tyear = {2024},\n\tnote = {Publisher: American Physical Society},\n\tpages = {115409},\n}\n\n</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" data-type=\"abstract\"\n     style=\"display:none\">\n  In this paper, we provide a comprehensive overview of the microwave-induced manipulation of electronic spin states in negatively charged group-IV color centers in diamond with a particular emphasis on the influence of strain. Central to our investigation is the consideration of the full vectorial attributes of the magnetic fields involved, which are a dc field for lifting the degeneracy of the spin levels and an ac field for microwave control between two spin levels. We observe an intricate interdependence between their spatial orientations, the externally applied strain, and the resultant efficacy in spin-state control. In most studies to date the ac and dc magnetic field orientations have been insufficiently addressed, which has led to the conclusion that strain is indispensable for the effective microwave control of heavier group-IV vacancies, such as tin- and lead-vacancy color centers. In contrast, we find that the alignment of the dc magnetic field orthogonal to the symmetry axis and the ac field parallel to it can make the application of strain obsolete for effective spin manipulation. Furthermore, we explore the implications of this field configuration on the spin's optical initialization, readout, and gate fidelities.\n</div>\n\n\n</div>\n\n\n\n\n\n    </div>\n  </div>\n\n  <div class=\"bibbase_group_whole\" id=\"group_2023\">\n    <div class=\"bibbase_group\"\n      onclick=\"toggleGroup('group_2023')\"\n      onkeypress=\"toggleGroup('group_2023')\"\n      tabindex=\"0\">\n      <i class=\"fa fa-angle-down bibbase_group_head_icon\"></i>&nbsp;\n      <span>2023</span>\n      <span class=\"bibbase_group_count\">\n        \n        (12)\n        \n      </span>\n    </div>\n    <div class=\"bibbase_group_body\">\n      \n  \n  <div class=\"bibbase_paper\" id=\"bopp-conradi-perona-palaci-wollenberg-flisgen-liero-christopher-etal-diamondonchipinfraredabsorptionmagneticfieldcamera-2023\">\n  <span class=\"bibbase_paper_titleauthoryear\">\n\n  \n  <span class=\"bibbase_paper_title\">\n  \n  \n  \n  <a href=\"http://arxiv.org/abs/2401.00854\"\n     onclick=\"return trackOutboundLink('publications', 'click', 'bopp-conradi-perona-palaci-wollenberg-flisgen-liero-christopher-etal-diamondonchipinfraredabsorptionmagneticfieldcamera-2023', 'http://arxiv.org/abs/2401.00854', event);\">\n    Diamond-on-chip infrared absorption magnetic field camera.\n  </a>\n  \n  \n  \n</span>\n\n  <span class=\"bibbase_paper_author\">\n  Bopp, J. M.; Conradi, H.; Perona, F.; Palaci, A.; Wollenberg, J.; Flisgen, T.; Liero, A.; Christopher, H.; Keil, N.; Knolle, W.; Knigge, A.; Heinrich, W.; Kleinert, M.;  and <a class=\"bibbase author link\" href=\"https://www.physik.hu-berlin.de/en/iqp/publications\">Schröder, T.</a>\n</span>\n\n  \n\n</span>\n\n  December 2023.\n  <span class=\"note\">arXiv:2401.00854 [physics, physics:quant-ph]</span>\n\n<span class=\"bibbase_note\"></span>\n\n<br class=\"bibbase_paper_content\"/>\n\n<span class=\"bibbase_paper_content dontprint\">\n\n  \n  <a href=\"http://arxiv.org/abs/2401.00854\"\n     onclick=\"log_download('bopp-conradi-perona-palaci-wollenberg-flisgen-liero-christopher-etal-diamondonchipinfraredabsorptionmagneticfieldcamera-2023', 'http://arxiv.org/abs/2401.00854', event.ctrlKey, event)\">\n    <img src=\"//bibbase.org/img/filetypes/link.svg\"\n\t     alt=\"Diamond-on-chip infrared absorption magnetic field camera [link]\"\n       title=\"Paper\"\n\t     class=\"bibbase_icon\"\n         ><span class=\"bibbase_icon_text\">Paper</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"http://doi.org/10.48550/arXiv.2401.00854\"\n     onclick=\"log_download('bopp-conradi-perona-palaci-wollenberg-flisgen-liero-christopher-etal-diamondonchipinfraredabsorptionmagneticfieldcamera-2023', 'http://doi.org/10.48550/arXiv.2401.00854', event.ctrlKey)\"\n     class=\"bibbase doi link\">\n    <span>doi</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"//bibbase.org/network/publication/bopp-conradi-perona-palaci-wollenberg-flisgen-liero-christopher-etal-diamondonchipinfraredabsorptionmagneticfieldcamera-2023\"\n     class=\"bibbase bibbase_page link\">link</a>\n  &nbsp;\n  \n\n  <a href=\"#\"\n     onclick=\"showBib(event); return false;\"\n     class=\"bibbase bibtex link\">bibtex\n    <i class=\"fa fa-caret-down\"></i></a>\n\n  \n  &nbsp;\n  <a class=\"bibbase_abstract_link bibbase link\"\n     href=\"#\"\n     onclick=\"showAbstract(event); return false;\">\n    abstract <i class=\"fa fa-caret-down\"></i></a>\n  \n\n  \n  &nbsp;\n  <span class=\"bibbase_stats_paper\" style=\"color: #777;\">\n    <span>6 downloads</span>\n  </span>\n  \n\n  <!-- <a class=\"bibbase read link hidden\" -->\n  <!--    href=\"javascript:toggleRead('bopp-conradi-perona-palaci-wollenberg-flisgen-liero-christopher-etal-diamondonchipinfraredabsorptionmagneticfieldcamera-2023')\" -->\n  <!--    title=\"Marking this paper as read adds it to your library on BibBase.\" -->\n  <!--    > -->\n  <!--   <i class=\"fa fa-check\"></i>&nbsp; -->\n  <!--   <span>mark as read</span> -->\n  <!-- </a> -->\n\n  &nbsp;\n  \n  \n  \n  \n  \n  \n  \n  \n\n</span>\n\n<div class=\"well well-small bibbase\" data-type=\"bibtex\"\n     style=\"display:none\">\n  <pre style=\"white-space: pre-wrap;\">@misc{bopp_diamond--chip_2023,\n\ttitle = {Diamond-on-chip infrared absorption magnetic field camera},\n\turl = {http://arxiv.org/abs/2401.00854},\n\tdoi = {10.48550/arXiv.2401.00854},\n\tabstract = {Integrated and fiber-packaged magnetic field sensors with a sensitivity sufficient to sense electric pulses propagating along nerves in life science applications and with a spatial resolution fine enough to resolve their propagation directions will trigger a tremendous step ahead not only in medical diagnostics, but in understanding neural processes. Nitrogen-vacancy centers in diamond represent the leading platform for such sensing tasks under ambient conditions. Current research on uniting a good sensitivity and a high spatial resolution is facilitated by scanning or imaging techniques. However, these techniques employ moving parts or bulky microscope setups. Despite being far developed, both approaches cannot be integrated and fiber-packaged to build a robust, adjustment-free hand-held device. In this work, we introduce novel concepts for spatially resolved magnetic field sensing and 2-D gradiometry with an integrated magnetic field camera. The camera is based on infrared absorption optically detected magnetic resonance (IRA-ODMR) mediated by perpendicularly intersecting infrared and pump laser beams forming a pixel matrix. We demonstrate our 3-by-3 pixel sensor&#x27;s capability to reconstruct the position of an electromagnet in space. Furthermore, we identify routes to enhance the magnetic field camera&#x27;s sensitivity and spatial resolution as required for complex sensing applications.},\n\turldate = {2024-01-04},\n\tpublisher = {arXiv},\n\tauthor = {Bopp, Julian M. and Conradi, Hauke and Perona, Felipe and Palaci, Anil and Wollenberg, Jonas and Flisgen, Thomas and Liero, Armin and Christopher, Heike and Keil, Norbert and Knolle, Wolfgang and Knigge, Andrea and Heinrich, Wolfgang and Kleinert, Moritz and Schröder, Tim},\n\tmonth = dec,\n\tyear = {2023},\n\tnote = {arXiv:2401.00854 [physics, physics:quant-ph]},\n\tkeywords = {Physics - Applied Physics, Physics - Optics, Quantum Physics},\n}\n\n</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" data-type=\"abstract\"\n     style=\"display:none\">\n  Integrated and fiber-packaged magnetic field sensors with a sensitivity sufficient to sense electric pulses propagating along nerves in life science applications and with a spatial resolution fine enough to resolve their propagation directions will trigger a tremendous step ahead not only in medical diagnostics, but in understanding neural processes. Nitrogen-vacancy centers in diamond represent the leading platform for such sensing tasks under ambient conditions. Current research on uniting a good sensitivity and a high spatial resolution is facilitated by scanning or imaging techniques. However, these techniques employ moving parts or bulky microscope setups. Despite being far developed, both approaches cannot be integrated and fiber-packaged to build a robust, adjustment-free hand-held device. In this work, we introduce novel concepts for spatially resolved magnetic field sensing and 2-D gradiometry with an integrated magnetic field camera. The camera is based on infrared absorption optically detected magnetic resonance (IRA-ODMR) mediated by perpendicularly intersecting infrared and pump laser beams forming a pixel matrix. We demonstrate our 3-by-3 pixel sensor's capability to reconstruct the position of an electromagnet in space. Furthermore, we identify routes to enhance the magnetic field camera's sensitivity and spatial resolution as required for complex sensing applications.\n</div>\n\n\n</div>\n\n\n  <div class=\"bibbase_paper\" id=\"bopp-plock-turan-pieplow-burger-schrder-sawfishphotoniccrystalcavityfornearunityemittertofiberinterfacinginquantumnetworkapplications-2023\">\n  <span class=\"bibbase_paper_titleauthoryear\">\n\n  \n  <span class=\"bibbase_paper_title\">\n  \n  \n  \n  <a href=\"https://onlinelibrary.wiley.com/doi/abs/10.1002/adom.202301286\"\n     onclick=\"return trackOutboundLink('publications', 'click', 'bopp-plock-turan-pieplow-burger-schrder-sawfishphotoniccrystalcavityfornearunityemittertofiberinterfacinginquantumnetworkapplications-2023', 'https://onlinelibrary.wiley.com/doi/abs/10.1002/adom.202301286', event);\">\n    ‘Sawfish’ Photonic Crystal Cavity for Near-Unity Emitter-to-Fiber Interfacing in Quantum Network Applications.\n  </a>\n  \n  \n  \n</span>\n\n  <span class=\"bibbase_paper_author\">\n  Bopp, J. M.; Plock, M.; Turan, T.; Pieplow, G.; Burger, S.;  and <a class=\"bibbase author link\" href=\"https://www.physik.hu-berlin.de/en/iqp/publications\">Schröder, T.</a>\n</span>\n\n  \n\n</span>\n\n  <i>Advanced Optical Materials</i>, n/a(n/a): 2301286. December 2023.\n  <span class=\"note\">_eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1002/adom.202301286</span>\n\n<span class=\"bibbase_note\"></span>\n\n<br class=\"bibbase_paper_content\"/>\n\n<span class=\"bibbase_paper_content dontprint\">\n\n  \n  <a href=\"https://onlinelibrary.wiley.com/doi/abs/10.1002/adom.202301286\"\n     onclick=\"log_download('bopp-plock-turan-pieplow-burger-schrder-sawfishphotoniccrystalcavityfornearunityemittertofiberinterfacinginquantumnetworkapplications-2023', 'https://onlinelibrary.wiley.com/doi/abs/10.1002/adom.202301286', event.ctrlKey, event)\">\n    <img src=\"//bibbase.org/img/filetypes/link.svg\"\n\t     alt=\"‘Sawfish’ Photonic Crystal Cavity for Near-Unity Emitter-to-Fiber Interfacing in Quantum Network Applications [link]\"\n       title=\"Paper\"\n\t     class=\"bibbase_icon\"\n         ><span class=\"bibbase_icon_text\">Paper</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"http://doi.org/10.1002/adom.202301286\"\n     onclick=\"log_download('bopp-plock-turan-pieplow-burger-schrder-sawfishphotoniccrystalcavityfornearunityemittertofiberinterfacinginquantumnetworkapplications-2023', 'http://doi.org/10.1002/adom.202301286', event.ctrlKey)\"\n     class=\"bibbase doi link\">\n    <span>doi</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"//bibbase.org/network/publication/bopp-plock-turan-pieplow-burger-schrder-sawfishphotoniccrystalcavityfornearunityemittertofiberinterfacinginquantumnetworkapplications-2023\"\n     class=\"bibbase bibbase_page link\">link</a>\n  &nbsp;\n  \n\n  <a href=\"#\"\n     onclick=\"showBib(event); return false;\"\n     class=\"bibbase bibtex link\">bibtex\n    <i class=\"fa fa-caret-down\"></i></a>\n\n  \n  &nbsp;\n  <a class=\"bibbase_abstract_link bibbase link\"\n     href=\"#\"\n     onclick=\"showAbstract(event); return false;\">\n    abstract <i class=\"fa fa-caret-down\"></i></a>\n  \n\n  \n  &nbsp;\n  <span class=\"bibbase_stats_paper\" style=\"color: #777;\">\n    <span>5 downloads</span>\n  </span>\n  \n\n  <!-- <a class=\"bibbase read link hidden\" -->\n  <!--    href=\"javascript:toggleRead('bopp-plock-turan-pieplow-burger-schrder-sawfishphotoniccrystalcavityfornearunityemittertofiberinterfacinginquantumnetworkapplications-2023')\" -->\n  <!--    title=\"Marking this paper as read adds it to your library on BibBase.\" -->\n  <!--    > -->\n  <!--   <i class=\"fa fa-check\"></i>&nbsp; -->\n  <!--   <span>mark as read</span> -->\n  <!-- </a> -->\n\n  &nbsp;\n  \n  \n  \n  \n  \n  \n  \n  \n  \n  \n  \n  \n  \n  \n  \n  \n\n</span>\n\n<div class=\"well well-small bibbase\" data-type=\"bibtex\"\n     style=\"display:none\">\n  <pre style=\"white-space: pre-wrap;\">@article{bopp_sawfish_2023,\n\ttitle = {‘{Sawfish}’ {Photonic} {Crystal} {Cavity} for {Near}-{Unity} {Emitter}-to-{Fiber} {Interfacing} in {Quantum} {Network} {Applications}},\n\tvolume = {n/a},\n\tcopyright = {© 2023 The Authors. Advanced Optical Materials published by Wiley-VCH GmbH},\n\tissn = {2195-1071},\n\turl = {https://onlinelibrary.wiley.com/doi/abs/10.1002/adom.202301286},\n\tdoi = {10.1002/adom.202301286},\n\tabstract = {Photon loss is one of the key challenges to overcome in complex photonic quantum applications. Photon collection efficiencies directly impact the amount of resources required for measurement-based quantum computation and communication networks. Promising resources include solid-state quantum light sources. However, efficiently coupling light from a single quantum emitter to a guided mode remains demanding. In this work, photon losses are eliminated by maximizing coupling efficiencies in an emitter-to-fiber interface. A waveguide-integrated ‘Sawfish’ photonic crystal cavity is developed and finite element (FEM) simulations are employed to demonstrate that such an emitter-to-fiber interface transfers, with 97.4 \\% efficiency, the zero-phonon line (ZPL) emission of a negatively-charged tin vacancy center in diamond (SnV−) adiabatically to a single-mode fiber. A surrogate model trained by machine learning provides quantitative estimates of sensitivities to fabrication tolerances. The corrugation-based Sawfish design proves robust under state-of-the-art nanofabrication parameters, maintaining an emitter-to-fiber coupling efficiency of 88.6 \\%. Applying the Sawfish cavity to a recent one-way quantum repeater protocol substantiates its potential in reducing resource requirements in quantum communication.},\n\tlanguage = {en},\n\tnumber = {n/a},\n\turldate = {2023-12-18},\n\tjournal = {Advanced Optical Materials},\n\tauthor = {Bopp, Julian M. and Plock, Matthias and Turan, Tim and Pieplow, Gregor and Burger, Sven and Schröder, Tim},\n\tmonth = dec,\n\tyear = {2023},\n\tnote = {\\_eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1002/adom.202301286},\n\tkeywords = {Debye-Waller factor, Purcell enhancement, Sawfish cavity, adiabatic coupling, diamond color center, photonic crystal cavity, photonic losses},\n\tpages = {2301286},\n}\n\n</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" data-type=\"abstract\"\n     style=\"display:none\">\n  Photon loss is one of the key challenges to overcome in complex photonic quantum applications. Photon collection efficiencies directly impact the amount of resources required for measurement-based quantum computation and communication networks. Promising resources include solid-state quantum light sources. However, efficiently coupling light from a single quantum emitter to a guided mode remains demanding. In this work, photon losses are eliminated by maximizing coupling efficiencies in an emitter-to-fiber interface. A waveguide-integrated ‘Sawfish’ photonic crystal cavity is developed and finite element (FEM) simulations are employed to demonstrate that such an emitter-to-fiber interface transfers, with 97.4 % efficiency, the zero-phonon line (ZPL) emission of a negatively-charged tin vacancy center in diamond (SnV−) adiabatically to a single-mode fiber. A surrogate model trained by machine learning provides quantitative estimates of sensitivities to fabrication tolerances. The corrugation-based Sawfish design proves robust under state-of-the-art nanofabrication parameters, maintaining an emitter-to-fiber coupling efficiency of 88.6 %. Applying the Sawfish cavity to a recent one-way quantum repeater protocol substantiates its potential in reducing resource requirements in quantum communication.\n</div>\n\n\n</div>\n\n\n  <div class=\"bibbase_paper\" id=\"torun-munns-herrmann-villafane-mller-thies-pregnolato-pieplow-etal-opticalprobingofphononicpropertiesofatinvacancycolorcenterindiamond-2023\">\n  <span class=\"bibbase_paper_titleauthoryear\">\n\n  \n  <span class=\"bibbase_paper_title\">\n  \n  \n  \n  <a href=\"http://arxiv.org/abs/2312.05335\"\n     onclick=\"return trackOutboundLink('publications', 'click', 'torun-munns-herrmann-villafane-mller-thies-pregnolato-pieplow-etal-opticalprobingofphononicpropertiesofatinvacancycolorcenterindiamond-2023', 'http://arxiv.org/abs/2312.05335', event);\">\n    Optical probing of phononic properties of a tin-vacancy color center in diamond.\n  </a>\n  \n  \n  \n</span>\n\n  <span class=\"bibbase_paper_author\">\n  Torun, C. G.; Munns, J. H. D.; Herrmann, F. M.; Villafane, V.; Müller, K.; Thies, A.; Pregnolato, T.; Pieplow, G.;  and <a class=\"bibbase author link\" href=\"https://www.physik.hu-berlin.de/en/iqp/publications\">Schröder, T.</a>\n</span>\n\n  \n\n</span>\n\n  December 2023.\n  <span class=\"note\">arXiv:2312.05335 [physics, physics:quant-ph]</span>\n\n<span class=\"bibbase_note\"></span>\n\n<br class=\"bibbase_paper_content\"/>\n\n<span class=\"bibbase_paper_content dontprint\">\n\n  \n  <a href=\"http://arxiv.org/abs/2312.05335\"\n     onclick=\"log_download('torun-munns-herrmann-villafane-mller-thies-pregnolato-pieplow-etal-opticalprobingofphononicpropertiesofatinvacancycolorcenterindiamond-2023', 'http://arxiv.org/abs/2312.05335', event.ctrlKey, event)\">\n    <img src=\"//bibbase.org/img/filetypes/link.svg\"\n\t     alt=\"Optical probing of phononic properties of a tin-vacancy color center in diamond [link]\"\n       title=\"Paper\"\n\t     class=\"bibbase_icon\"\n         ><span class=\"bibbase_icon_text\">Paper</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"http://doi.org/10.48550/arXiv.2312.05335\"\n     onclick=\"log_download('torun-munns-herrmann-villafane-mller-thies-pregnolato-pieplow-etal-opticalprobingofphononicpropertiesofatinvacancycolorcenterindiamond-2023', 'http://doi.org/10.48550/arXiv.2312.05335', event.ctrlKey)\"\n     class=\"bibbase doi link\">\n    <span>doi</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"//bibbase.org/network/publication/torun-munns-herrmann-villafane-mller-thies-pregnolato-pieplow-etal-opticalprobingofphononicpropertiesofatinvacancycolorcenterindiamond-2023\"\n     class=\"bibbase bibbase_page link\">link</a>\n  &nbsp;\n  \n\n  <a href=\"#\"\n     onclick=\"showBib(event); return false;\"\n     class=\"bibbase bibtex link\">bibtex\n    <i class=\"fa fa-caret-down\"></i></a>\n\n  \n  &nbsp;\n  <a class=\"bibbase_abstract_link bibbase link\"\n     href=\"#\"\n     onclick=\"showAbstract(event); return false;\">\n    abstract <i class=\"fa fa-caret-down\"></i></a>\n  \n\n  \n\n  <!-- <a class=\"bibbase read link hidden\" -->\n  <!--    href=\"javascript:toggleRead('torun-munns-herrmann-villafane-mller-thies-pregnolato-pieplow-etal-opticalprobingofphononicpropertiesofatinvacancycolorcenterindiamond-2023')\" -->\n  <!--    title=\"Marking this paper as read adds it to your library on BibBase.\" -->\n  <!--    > -->\n  <!--   <i class=\"fa fa-check\"></i>&nbsp; -->\n  <!--   <span>mark as read</span> -->\n  <!-- </a> -->\n\n  &nbsp;\n  \n  \n  \n  \n  \n  \n\n</span>\n\n<div class=\"well well-small bibbase\" data-type=\"bibtex\"\n     style=\"display:none\">\n  <pre style=\"white-space: pre-wrap;\">@misc{torun_optical_2023,\n\ttitle = {Optical probing of phononic properties of a tin-vacancy color center in diamond},\n\turl = {http://arxiv.org/abs/2312.05335},\n\tdoi = {10.48550/arXiv.2312.05335},\n\tabstract = {The coherence characteristics of a tin-vacancy color center in diamond are investigated through optical means including coherent population trapping between the ground state orbital levels and linewidth broadening effects. Due to the large spin-orbit splitting of the orbital ground states, thermalization between the ground states occurs at rates that are impractical to measure directly. Here, spectral information is transformed into its conjugate variable time, providing picosecond resolution and revealing an orbital depolarization timescale of \\$\\{{\\textbackslash}sim30\\{{\\textbackslash}rm{\\textasciitilde}ps\\}\\}\\$. Consequences of the investigated dynamics are then used to estimate spin dephasing times limited by thermal effects.},\n\turldate = {2023-12-12},\n\tpublisher = {arXiv},\n\tauthor = {Torun, Cem Güney and Munns, Joseph H. D. and Herrmann, Franziska Marie and Villafane, Viviana and Müller, Kai and Thies, Andreas and Pregnolato, Tommaso and Pieplow, Gregor and Schröder, Tim},\n\tmonth = dec,\n\tyear = {2023},\n\tnote = {arXiv:2312.05335 [physics, physics:quant-ph]},\n\tkeywords = {Physics - Applied Physics, Quantum Physics},\n}\n\n</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" data-type=\"abstract\"\n     style=\"display:none\">\n  The coherence characteristics of a tin-vacancy color center in diamond are investigated through optical means including coherent population trapping between the ground state orbital levels and linewidth broadening effects. Due to the large spin-orbit splitting of the orbital ground states, thermalization between the ground states occurs at rates that are impractical to measure directly. Here, spectral information is transformed into its conjugate variable time, providing picosecond resolution and revealing an orbital depolarization timescale of $\\{{\\}sim30\\{{\\}rm{~}ps\\}\\}$. Consequences of the investigated dynamics are then used to estimate spin dephasing times limited by thermal effects.\n</div>\n\n\n</div>\n\n\n  <div class=\"bibbase_paper\" id=\"gndogdu-pazzagli-pregnolato-kolbe-hagedorn-weyers-schrder-alganphotonicdeviceplatform-2023\">\n  <span class=\"bibbase_paper_titleauthoryear\">\n\n  \n  <span class=\"bibbase_paper_title\">\n  \n  \n  \n  <a href=\"http://arxiv.org/abs/2312.03128\"\n     onclick=\"return trackOutboundLink('publications', 'click', 'gndogdu-pazzagli-pregnolato-kolbe-hagedorn-weyers-schrder-alganphotonicdeviceplatform-2023', 'http://arxiv.org/abs/2312.03128', event);\">\n    AlGaN photonic device platform.\n  </a>\n  \n  \n  \n</span>\n\n  <span class=\"bibbase_paper_author\">\n  Gündogdu, S.; Pazzagli, S.; Pregnolato, T.; Kolbe, T.; Hagedorn, S.; Weyers, M.;  and <a class=\"bibbase author link\" href=\"https://www.physik.hu-berlin.de/en/iqp/publications\">Schröder, T.</a>\n</span>\n\n  \n\n</span>\n\n  December 2023.\n  <span class=\"note\">arXiv:2312.03128 [physics]</span>\n\n<span class=\"bibbase_note\"></span>\n\n<br class=\"bibbase_paper_content\"/>\n\n<span class=\"bibbase_paper_content dontprint\">\n\n  \n  <a href=\"http://arxiv.org/abs/2312.03128\"\n     onclick=\"log_download('gndogdu-pazzagli-pregnolato-kolbe-hagedorn-weyers-schrder-alganphotonicdeviceplatform-2023', 'http://arxiv.org/abs/2312.03128', event.ctrlKey, event)\">\n    <img src=\"//bibbase.org/img/filetypes/link.svg\"\n\t     alt=\"AlGaN photonic device platform [link]\"\n       title=\"Paper\"\n\t     class=\"bibbase_icon\"\n         ><span class=\"bibbase_icon_text\">Paper</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"http://doi.org/10.48550/arXiv.2312.03128\"\n     onclick=\"log_download('gndogdu-pazzagli-pregnolato-kolbe-hagedorn-weyers-schrder-alganphotonicdeviceplatform-2023', 'http://doi.org/10.48550/arXiv.2312.03128', event.ctrlKey)\"\n     class=\"bibbase doi link\">\n    <span>doi</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"//bibbase.org/network/publication/gndogdu-pazzagli-pregnolato-kolbe-hagedorn-weyers-schrder-alganphotonicdeviceplatform-2023\"\n     class=\"bibbase bibbase_page link\">link</a>\n  &nbsp;\n  \n\n  <a href=\"#\"\n     onclick=\"showBib(event); return false;\"\n     class=\"bibbase bibtex link\">bibtex\n    <i class=\"fa fa-caret-down\"></i></a>\n\n  \n  &nbsp;\n  <a class=\"bibbase_abstract_link bibbase link\"\n     href=\"#\"\n     onclick=\"showAbstract(event); return false;\">\n    abstract <i class=\"fa fa-caret-down\"></i></a>\n  \n\n  \n  &nbsp;\n  <span class=\"bibbase_stats_paper\" style=\"color: #777;\">\n    <span>1 download</span>\n  </span>\n  \n\n  <!-- <a class=\"bibbase read link hidden\" -->\n  <!--    href=\"javascript:toggleRead('gndogdu-pazzagli-pregnolato-kolbe-hagedorn-weyers-schrder-alganphotonicdeviceplatform-2023')\" -->\n  <!--    title=\"Marking this paper as read adds it to your library on BibBase.\" -->\n  <!--    > -->\n  <!--   <i class=\"fa fa-check\"></i>&nbsp; -->\n  <!--   <span>mark as read</span> -->\n  <!-- </a> -->\n\n  &nbsp;\n  \n  \n  \n  \n  \n  \n\n</span>\n\n<div class=\"well well-small bibbase\" data-type=\"bibtex\"\n     style=\"display:none\">\n  <pre style=\"white-space: pre-wrap;\">@misc{gundogdu_algan_2023,\n\ttitle = {{AlGaN} photonic device platform},\n\turl = {http://arxiv.org/abs/2312.03128},\n\tdoi = {10.48550/arXiv.2312.03128},\n\tabstract = {In the rapidly evolving area of integrated photonics, there is a growing need for materials to support the fast development of advanced and more complex optical on-chip systems. Present photonic material platforms have significantly progressed over the past years; however, at the same time, they face critical challenges. We introduce a novel material for integrated photonics and investigate Aluminum Gallium Nitride (AlGaN) on Aluminum Nitride (AlN) templates as a platform for developing reconfigurable and on-chip nonlinear optical devices. AlGaN combines compatibility with standard fabrication technologies and high electro-optic modulation capabilities with reduced loss in a broad spectrum, making it a viable material for advanced photonic applications. We engineer and grow light-guiding photonic layers and fabricate waveguides, directional couplers, and other on-chip devices. Our AlGaN ring resonators demonstrate tunability and high Q-factors due to the low-loss waveguiding. The comprehensive platform paves the way for nonlinear photon-pair generation applications, on-chip nonlinear quantum frequency conversion, and fast electro-optic modulation for switching and routing.},\n\turldate = {2023-12-11},\n\tpublisher = {arXiv},\n\tauthor = {Gündogdu, Sinan and Pazzagli, Sofia and Pregnolato, Tommaso and Kolbe, Tim and Hagedorn, Sylvia and Weyers, Markus and Schröder, Tim},\n\tmonth = dec,\n\tyear = {2023},\n\tnote = {arXiv:2312.03128 [physics]},\n\tkeywords = {Physics - Applied Physics, Physics - Optics},\n}\n\n</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" data-type=\"abstract\"\n     style=\"display:none\">\n  In the rapidly evolving area of integrated photonics, there is a growing need for materials to support the fast development of advanced and more complex optical on-chip systems. Present photonic material platforms have significantly progressed over the past years; however, at the same time, they face critical challenges. We introduce a novel material for integrated photonics and investigate Aluminum Gallium Nitride (AlGaN) on Aluminum Nitride (AlN) templates as a platform for developing reconfigurable and on-chip nonlinear optical devices. AlGaN combines compatibility with standard fabrication technologies and high electro-optic modulation capabilities with reduced loss in a broad spectrum, making it a viable material for advanced photonic applications. We engineer and grow light-guiding photonic layers and fabricate waveguides, directional couplers, and other on-chip devices. Our AlGaN ring resonators demonstrate tunability and high Q-factors due to the low-loss waveguiding. The comprehensive platform paves the way for nonlinear photon-pair generation applications, on-chip nonlinear quantum frequency conversion, and fast electro-optic modulation for switching and routing.\n</div>\n\n\n</div>\n\n\n  <div class=\"bibbase_paper\" id=\"pieplow-strocka-isazamonsalve-munns-schrder-deterministiccreationoflargephotonicmultipartiteentangledstateswithgroupivcolorcentersindiamond-2023\">\n  <span class=\"bibbase_paper_titleauthoryear\">\n\n  \n  <span class=\"bibbase_paper_title\">\n  \n  \n  \n  <a href=\"http://arxiv.org/abs/2312.03952\"\n     onclick=\"return trackOutboundLink('publications', 'click', 'pieplow-strocka-isazamonsalve-munns-schrder-deterministiccreationoflargephotonicmultipartiteentangledstateswithgroupivcolorcentersindiamond-2023', 'http://arxiv.org/abs/2312.03952', event);\">\n    Deterministic Creation of Large Photonic Multipartite Entangled States with Group-IV Color Centers in Diamond.\n  </a>\n  \n  \n  \n</span>\n\n  <span class=\"bibbase_paper_author\">\n  Pieplow, G.; Strocka, Y.; Isaza-Monsalve, M.; Munns, J. H. D.;  and <a class=\"bibbase author link\" href=\"https://www.physik.hu-berlin.de/en/iqp/publications\">Schröder, T.</a>\n</span>\n\n  \n\n</span>\n\n  December 2023.\n  <span class=\"note\">arXiv:2312.03952 [quant-ph]</span>\n\n<span class=\"bibbase_note\"></span>\n\n<br class=\"bibbase_paper_content\"/>\n\n<span class=\"bibbase_paper_content dontprint\">\n\n  \n  <a href=\"http://arxiv.org/abs/2312.03952\"\n     onclick=\"log_download('pieplow-strocka-isazamonsalve-munns-schrder-deterministiccreationoflargephotonicmultipartiteentangledstateswithgroupivcolorcentersindiamond-2023', 'http://arxiv.org/abs/2312.03952', event.ctrlKey, event)\">\n    <img src=\"//bibbase.org/img/filetypes/link.svg\"\n\t     alt=\"Deterministic Creation of Large Photonic Multipartite Entangled States with Group-IV Color Centers in Diamond [link]\"\n       title=\"Paper\"\n\t     class=\"bibbase_icon\"\n         ><span class=\"bibbase_icon_text\">Paper</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"http://doi.org/10.48550/arXiv.2312.03952\"\n     onclick=\"log_download('pieplow-strocka-isazamonsalve-munns-schrder-deterministiccreationoflargephotonicmultipartiteentangledstateswithgroupivcolorcentersindiamond-2023', 'http://doi.org/10.48550/arXiv.2312.03952', event.ctrlKey)\"\n     class=\"bibbase doi link\">\n    <span>doi</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"//bibbase.org/network/publication/pieplow-strocka-isazamonsalve-munns-schrder-deterministiccreationoflargephotonicmultipartiteentangledstateswithgroupivcolorcentersindiamond-2023\"\n     class=\"bibbase bibbase_page link\">link</a>\n  &nbsp;\n  \n\n  <a href=\"#\"\n     onclick=\"showBib(event); return false;\"\n     class=\"bibbase bibtex link\">bibtex\n    <i class=\"fa fa-caret-down\"></i></a>\n\n  \n  &nbsp;\n  <a class=\"bibbase_abstract_link bibbase link\"\n     href=\"#\"\n     onclick=\"showAbstract(event); return false;\">\n    abstract <i class=\"fa fa-caret-down\"></i></a>\n  \n\n  \n  &nbsp;\n  <span class=\"bibbase_stats_paper\" style=\"color: #777;\">\n    <span>1 download</span>\n  </span>\n  \n\n  <!-- <a class=\"bibbase read link hidden\" -->\n  <!--    href=\"javascript:toggleRead('pieplow-strocka-isazamonsalve-munns-schrder-deterministiccreationoflargephotonicmultipartiteentangledstateswithgroupivcolorcentersindiamond-2023')\" -->\n  <!--    title=\"Marking this paper as read adds it to your library on BibBase.\" -->\n  <!--    > -->\n  <!--   <i class=\"fa fa-check\"></i>&nbsp; -->\n  <!--   <span>mark as read</span> -->\n  <!-- </a> -->\n\n  &nbsp;\n  \n  \n  \n  \n\n</span>\n\n<div class=\"well well-small bibbase\" data-type=\"bibtex\"\n     style=\"display:none\">\n  <pre style=\"white-space: pre-wrap;\">@misc{pieplow_deterministic_2023,\n\ttitle = {Deterministic {Creation} of {Large} {Photonic} {Multipartite} {Entangled} {States} with {Group}-{IV} {Color} {Centers} in {Diamond}},\n\turl = {http://arxiv.org/abs/2312.03952},\n\tdoi = {10.48550/arXiv.2312.03952},\n\tabstract = {Measurement-based quantum computation relies on single qubit measurements of large multipartite entangled states, so-called lattice-graph or cluster states. Graph states are also an important resource for quantum communication, where tree cluster states are a key resource for one-way quantum repeaters. A photonic realization of this kind of state would inherit many of the benefits of photonic platforms, such as very little dephasing due to weak environmental interactions and the well-developed infrastructure to route and measure photonic qubits. In this work, a linear cluster state and GHZ state generation scheme is developed for group-IV color centers. In particular, this article focuses on an in-depth investigation of the required control operations, including the coherent spin and excitation gates. We choose an off-resonant Raman scheme for the spin gates, which can be much faster than microwave control. We do not rely on a reduced level scheme and use efficient approximations to design high-fidelity Raman gates. We benchmark the spin-control and excitation scheme using the tin vacancy color center coupled to a cavity, assuming a realistic experimental setting. Additionally, the article investigates the fidelities of the Raman and excitation gates in the presence of radiative and non-radiative decay mechanisms. Finally, a quality measure is devised, which emphasizes the importance of fast and high-fidelity spin gates in the creation of large entangled photonic states.},\n\turldate = {2023-12-11},\n\tpublisher = {arXiv},\n\tauthor = {Pieplow, Gregor and Strocka, Yannick and Isaza-Monsalve, Mariano and Munns, Joseph H. D. and Schröder, Tim},\n\tmonth = dec,\n\tyear = {2023},\n\tnote = {arXiv:2312.03952 [quant-ph]},\n\tkeywords = {Quantum Physics},\n}\n\n</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" data-type=\"abstract\"\n     style=\"display:none\">\n  Measurement-based quantum computation relies on single qubit measurements of large multipartite entangled states, so-called lattice-graph or cluster states. Graph states are also an important resource for quantum communication, where tree cluster states are a key resource for one-way quantum repeaters. A photonic realization of this kind of state would inherit many of the benefits of photonic platforms, such as very little dephasing due to weak environmental interactions and the well-developed infrastructure to route and measure photonic qubits. In this work, a linear cluster state and GHZ state generation scheme is developed for group-IV color centers. In particular, this article focuses on an in-depth investigation of the required control operations, including the coherent spin and excitation gates. We choose an off-resonant Raman scheme for the spin gates, which can be much faster than microwave control. We do not rely on a reduced level scheme and use efficient approximations to design high-fidelity Raman gates. We benchmark the spin-control and excitation scheme using the tin vacancy color center coupled to a cavity, assuming a realistic experimental setting. Additionally, the article investigates the fidelities of the Raman and excitation gates in the presence of radiative and non-radiative decay mechanisms. Finally, a quality measure is devised, which emphasizes the importance of fast and high-fidelity spin gates in the creation of large entangled photonic states.\n</div>\n\n\n</div>\n\n\n  <div class=\"bibbase_paper\" id=\"torun-gke-bracht-monsalve-benbouabdellah-nacitarhan-stucki-markham-etal-superandsubpicosecondcoherentcontrolofanopticalqubitinatinvacancycolorcenterindiamond-2023\">\n  <span class=\"bibbase_paper_titleauthoryear\">\n\n  \n  <span class=\"bibbase_paper_title\">\n  \n  \n  \n  <a href=\"http://arxiv.org/abs/2312.05246\"\n     onclick=\"return trackOutboundLink('publications', 'click', 'torun-gke-bracht-monsalve-benbouabdellah-nacitarhan-stucki-markham-etal-superandsubpicosecondcoherentcontrolofanopticalqubitinatinvacancycolorcenterindiamond-2023', 'http://arxiv.org/abs/2312.05246', event);\">\n    SUPER and subpicosecond coherent control of an optical qubit in a tin-vacancy color center in diamond.\n  </a>\n  \n  \n  \n</span>\n\n  <span class=\"bibbase_paper_author\">\n  Torun, C. G.; Gökçe, M.; Bracht, T. K.; Monsalve, M. I.; Benbouabdellah, S.; Nacitarhan, Ö. O.; Stucki, M. E.; Markham, M. L.; Pieplow, G.; Pregnolato, T.; Munns, J. H. D.; Reiter, D. E.;  and <a class=\"bibbase author link\" href=\"https://www.physik.hu-berlin.de/en/iqp/publications\">Schröder, T.</a>\n</span>\n\n  \n\n</span>\n\n  December 2023.\n  <span class=\"note\">arXiv:2312.05246 [quant-ph]</span>\n\n<span class=\"bibbase_note\"></span>\n\n<br class=\"bibbase_paper_content\"/>\n\n<span class=\"bibbase_paper_content dontprint\">\n\n  \n  <a href=\"http://arxiv.org/abs/2312.05246\"\n     onclick=\"log_download('torun-gke-bracht-monsalve-benbouabdellah-nacitarhan-stucki-markham-etal-superandsubpicosecondcoherentcontrolofanopticalqubitinatinvacancycolorcenterindiamond-2023', 'http://arxiv.org/abs/2312.05246', event.ctrlKey, event)\">\n    <img src=\"//bibbase.org/img/filetypes/link.svg\"\n\t     alt=\"SUPER and subpicosecond coherent control of an optical qubit in a tin-vacancy color center in diamond [link]\"\n       title=\"Paper\"\n\t     class=\"bibbase_icon\"\n         ><span class=\"bibbase_icon_text\">Paper</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"http://doi.org/10.48550/arXiv.2312.05246\"\n     onclick=\"log_download('torun-gke-bracht-monsalve-benbouabdellah-nacitarhan-stucki-markham-etal-superandsubpicosecondcoherentcontrolofanopticalqubitinatinvacancycolorcenterindiamond-2023', 'http://doi.org/10.48550/arXiv.2312.05246', event.ctrlKey)\"\n     class=\"bibbase doi link\">\n    <span>doi</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"//bibbase.org/network/publication/torun-gke-bracht-monsalve-benbouabdellah-nacitarhan-stucki-markham-etal-superandsubpicosecondcoherentcontrolofanopticalqubitinatinvacancycolorcenterindiamond-2023\"\n     class=\"bibbase bibbase_page link\">link</a>\n  &nbsp;\n  \n\n  <a href=\"#\"\n     onclick=\"showBib(event); return false;\"\n     class=\"bibbase bibtex link\">bibtex\n    <i class=\"fa fa-caret-down\"></i></a>\n\n  \n  &nbsp;\n  <a class=\"bibbase_abstract_link bibbase link\"\n     href=\"#\"\n     onclick=\"showAbstract(event); return false;\">\n    abstract <i class=\"fa fa-caret-down\"></i></a>\n  \n\n  \n  &nbsp;\n  <span class=\"bibbase_stats_paper\" style=\"color: #777;\">\n    <span>3 downloads</span>\n  </span>\n  \n\n  <!-- <a class=\"bibbase read link hidden\" -->\n  <!--    href=\"javascript:toggleRead('torun-gke-bracht-monsalve-benbouabdellah-nacitarhan-stucki-markham-etal-superandsubpicosecondcoherentcontrolofanopticalqubitinatinvacancycolorcenterindiamond-2023')\" -->\n  <!--    title=\"Marking this paper as read adds it to your library on BibBase.\" -->\n  <!--    > -->\n  <!--   <i class=\"fa fa-check\"></i>&nbsp; -->\n  <!--   <span>mark as read</span> -->\n  <!-- </a> -->\n\n  &nbsp;\n  \n  \n  \n  \n\n</span>\n\n<div class=\"well well-small bibbase\" data-type=\"bibtex\"\n     style=\"display:none\">\n  <pre style=\"white-space: pre-wrap;\">@misc{torun_super_2023,\n\ttitle = {{SUPER} and subpicosecond coherent control of an optical qubit in a tin-vacancy color center in diamond},\n\turl = {http://arxiv.org/abs/2312.05246},\n\tdoi = {10.48550/arXiv.2312.05246},\n\tabstract = {The coherent excitation of an optically active spin system is one of the key elements in the engineering of a spin-photon interface. In this work, we use the novel SUPER scheme, employing nonresonant ultrashort optical pulses, to coherently control the main optical transition of a tin-vacancy color center in diamond, a promising emitter that can both be utilized as a quantum memory and a single-photon source. Furthermore, we implement a subpicosecond control scheme using resonant pulses for achieving record short quantum gates applied to diamond color centers. The employed ultrafast quantum gates open up a new regime of quantum information processing with solid-state color centers, eventually enabling multi-gate operations with the optical qubit and efficient spectral filtering of the excitation laser from deterministically prepared coherent photons.},\n\turldate = {2023-12-11},\n\tpublisher = {arXiv},\n\tauthor = {Torun, Cem Güney and Gökçe, Mustafa and Bracht, Thomas K. and Monsalve, Mariano Isaza and Benbouabdellah, Sarah and Nacitarhan, Özgün Ozan and Stucki, Marco E. and Markham, Matthew L. and Pieplow, Gregor and Pregnolato, Tommaso and Munns, Joseph H. D. and Reiter, Doris E. and Schröder, Tim},\n\tmonth = dec,\n\tyear = {2023},\n\tnote = {arXiv:2312.05246 [quant-ph]},\n\tkeywords = {Quantum Physics},\n}\n\n</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" data-type=\"abstract\"\n     style=\"display:none\">\n  The coherent excitation of an optically active spin system is one of the key elements in the engineering of a spin-photon interface. In this work, we use the novel SUPER scheme, employing nonresonant ultrashort optical pulses, to coherently control the main optical transition of a tin-vacancy color center in diamond, a promising emitter that can both be utilized as a quantum memory and a single-photon source. Furthermore, we implement a subpicosecond control scheme using resonant pulses for achieving record short quantum gates applied to diamond color centers. The employed ultrafast quantum gates open up a new regime of quantum information processing with solid-state color centers, eventually enabling multi-gate operations with the optical qubit and efficient spectral filtering of the excitation laser from deterministically prepared coherent photons.\n</div>\n\n\n</div>\n\n\n  <div class=\"bibbase_paper\" id=\"wo-avis-rozpdek-morruiz-pieplow-schrder-jiang-srensen-etal-resourceefficientfaulttolerantonewayquantumrepeaterwithcodeconcatenation-2023\">\n  <span class=\"bibbase_paper_titleauthoryear\">\n\n  \n  <span class=\"bibbase_paper_title\">\n  \n  \n  \n  <a href=\"http://arxiv.org/abs/2306.07224\"\n     onclick=\"return trackOutboundLink('publications', 'click', 'wo-avis-rozpdek-morruiz-pieplow-schrder-jiang-srensen-etal-resourceefficientfaulttolerantonewayquantumrepeaterwithcodeconcatenation-2023', 'http://arxiv.org/abs/2306.07224', event);\">\n    Resource-efficient fault-tolerant one-way quantum repeater with code concatenation.\n  </a>\n  \n  \n  \n</span>\n\n  <span class=\"bibbase_paper_author\">\n  Wo, K. J.; Avis, G.; Rozpędek, F.; Mor-Ruiz, M. F.; Pieplow, G.; <a class=\"bibbase author link\" href=\"https://www.physik.hu-berlin.de/en/iqp/publications\">Schröder, T.</a>; Jiang, L.; Sørensen, A. S.;  and Borregaard, J.\n</span>\n\n  \n\n</span>\n\n  October 2023.\n  <span class=\"note\">arXiv:2306.07224 [quant-ph]</span>\n\n<span class=\"bibbase_note\"></span>\n\n<br class=\"bibbase_paper_content\"/>\n\n<span class=\"bibbase_paper_content dontprint\">\n\n  \n  <a href=\"http://arxiv.org/abs/2306.07224\"\n     onclick=\"log_download('wo-avis-rozpdek-morruiz-pieplow-schrder-jiang-srensen-etal-resourceefficientfaulttolerantonewayquantumrepeaterwithcodeconcatenation-2023', 'http://arxiv.org/abs/2306.07224', event.ctrlKey, event)\">\n    <img src=\"//bibbase.org/img/filetypes/link.svg\"\n\t     alt=\"Resource-efficient fault-tolerant one-way quantum repeater with code concatenation [link]\"\n       title=\"Paper\"\n\t     class=\"bibbase_icon\"\n         ><span class=\"bibbase_icon_text\">Paper</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"http://doi.org/10.48550/arXiv.2306.07224\"\n     onclick=\"log_download('wo-avis-rozpdek-morruiz-pieplow-schrder-jiang-srensen-etal-resourceefficientfaulttolerantonewayquantumrepeaterwithcodeconcatenation-2023', 'http://doi.org/10.48550/arXiv.2306.07224', event.ctrlKey)\"\n     class=\"bibbase doi link\">\n    <span>doi</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"//bibbase.org/network/publication/wo-avis-rozpdek-morruiz-pieplow-schrder-jiang-srensen-etal-resourceefficientfaulttolerantonewayquantumrepeaterwithcodeconcatenation-2023\"\n     class=\"bibbase bibbase_page link\">link</a>\n  &nbsp;\n  \n\n  <a href=\"#\"\n     onclick=\"showBib(event); return false;\"\n     class=\"bibbase bibtex link\">bibtex\n    <i class=\"fa fa-caret-down\"></i></a>\n\n  \n  &nbsp;\n  <a class=\"bibbase_abstract_link bibbase link\"\n     href=\"#\"\n     onclick=\"showAbstract(event); return false;\">\n    abstract <i class=\"fa fa-caret-down\"></i></a>\n  \n\n  \n  &nbsp;\n  <span class=\"bibbase_stats_paper\" style=\"color: #777;\">\n    <span>2 downloads</span>\n  </span>\n  \n\n  <!-- <a class=\"bibbase read link hidden\" -->\n  <!--    href=\"javascript:toggleRead('wo-avis-rozpdek-morruiz-pieplow-schrder-jiang-srensen-etal-resourceefficientfaulttolerantonewayquantumrepeaterwithcodeconcatenation-2023')\" -->\n  <!--    title=\"Marking this paper as read adds it to your library on BibBase.\" -->\n  <!--    > -->\n  <!--   <i class=\"fa fa-check\"></i>&nbsp; -->\n  <!--   <span>mark as read</span> -->\n  <!-- </a> -->\n\n  &nbsp;\n  \n  \n  \n  \n\n</span>\n\n<div class=\"well well-small bibbase\" data-type=\"bibtex\"\n     style=\"display:none\">\n  <pre style=\"white-space: pre-wrap;\">@misc{wo_resource-efficient_2023,\n\ttitle = {Resource-efficient fault-tolerant one-way quantum repeater with code concatenation},\n\turl = {http://arxiv.org/abs/2306.07224},\n\tdoi = {10.48550/arXiv.2306.07224},\n\tabstract = {One-way quantum repeaters where loss and operational errors are counteracted by quantum error correcting codes can ensure fast and reliable qubit transmission in quantum networks. It is crucial that the resource requirements of such repeaters, for example, the number of qubits per repeater node and the complexity of the quantum error correcting operations are kept to a minimum to allow for near-future implementations. To this end, we propose a one-way quantum repeater that targets both the loss and operational error rates in a communication channel in a resource-efficient manner using code concatenation. Specifically, we consider a tree-cluster code as an inner loss-tolerant code concatenated with an outer 5-qubit code for protection against Pauli errors. Adopting flag-based stabilizer measurements, we show that intercontinental distances of up to 10,000 km can be bridged with a minimal resource overhead by interspersing repeater nodes that each specializes in suppressing either loss or operational errors. Our work demonstrates how tailored error-correcting codes can significantly lower the experimental requirements for long-distance quantum communication.},\n\turldate = {2023-11-16},\n\tpublisher = {arXiv},\n\tauthor = {Wo, Kah Jen and Avis, Guus and Rozpędek, Filip and Mor-Ruiz, Maria Flors and Pieplow, Gregor and Schröder, Tim and Jiang, Liang and Sørensen, Anders Søndberg and Borregaard, Johannes},\n\tmonth = oct,\n\tyear = {2023},\n\tnote = {arXiv:2306.07224 [quant-ph]},\n\tkeywords = {Quantum Physics},\n}\n\n</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" data-type=\"abstract\"\n     style=\"display:none\">\n  One-way quantum repeaters where loss and operational errors are counteracted by quantum error correcting codes can ensure fast and reliable qubit transmission in quantum networks. It is crucial that the resource requirements of such repeaters, for example, the number of qubits per repeater node and the complexity of the quantum error correcting operations are kept to a minimum to allow for near-future implementations. To this end, we propose a one-way quantum repeater that targets both the loss and operational error rates in a communication channel in a resource-efficient manner using code concatenation. Specifically, we consider a tree-cluster code as an inner loss-tolerant code concatenated with an outer 5-qubit code for protection against Pauli errors. Adopting flag-based stabilizer measurements, we show that intercontinental distances of up to 10,000 km can be bridged with a minimal resource overhead by interspersing repeater nodes that each specializes in suppressing either loss or operational errors. Our work demonstrates how tailored error-correcting codes can significantly lower the experimental requirements for long-distance quantum communication.\n</div>\n\n\n</div>\n\n\n  <div class=\"bibbase_paper\" id=\"bopp-plock-turan-pieplow-burger-schrder-sawfishspinphotoninterfacefornearunityemittertowaveguidecoupling-2023\">\n  <span class=\"bibbase_paper_titleauthoryear\">\n\n  \n  <span class=\"bibbase_paper_title\">\n  \n  \n  \n  <a href=\"https://opg.optica.org/abstract.cfm?uri=CLEO_SI-2023-SF1O.6\"\n     onclick=\"return trackOutboundLink('publications', 'click', 'bopp-plock-turan-pieplow-burger-schrder-sawfishspinphotoninterfacefornearunityemittertowaveguidecoupling-2023', 'https://opg.optica.org/abstract.cfm?uri=CLEO_SI-2023-SF1O.6', event);\">\n    ‘Sawfish’ Spin-Photon Interface for Near-Unity Emitter-to-Waveguide Coupling.\n  </a>\n  \n  \n  \n</span>\n\n  <span class=\"bibbase_paper_author\">\n  Bopp, J. M.; Plock, M.; Turan, T.; Pieplow, G.; Burger, S.;  and <a class=\"bibbase author link\" href=\"https://www.physik.hu-berlin.de/en/iqp/publications\">Schröder, T.</a>\n</span>\n\n  \n\n</span>\n\n  In <i>CLEO 2023 (2023), paper SF1O.6</i>, pages SF1O.6, May 2023. Optica Publishing Group\n  <span class=\"note\"></span>\n\n<span class=\"bibbase_note\"></span>\n\n<br class=\"bibbase_paper_content\"/>\n\n<span class=\"bibbase_paper_content dontprint\">\n\n  \n  <a href=\"https://opg.optica.org/abstract.cfm?uri=CLEO_SI-2023-SF1O.6\"\n     onclick=\"log_download('bopp-plock-turan-pieplow-burger-schrder-sawfishspinphotoninterfacefornearunityemittertowaveguidecoupling-2023', 'https://opg.optica.org/abstract.cfm?uri=CLEO_SI-2023-SF1O.6', event.ctrlKey, event)\">\n    <img src=\"//bibbase.org/img/filetypes/link.svg\"\n\t     alt=\"‘Sawfish’ Spin-Photon Interface for Near-Unity Emitter-to-Waveguide Coupling [link]\"\n       title=\"Paper\"\n\t     class=\"bibbase_icon\"\n         ><span class=\"bibbase_icon_text\">Paper</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"http://doi.org/10.1364/CLEO_SI.2023.SF1O.6\"\n     onclick=\"log_download('bopp-plock-turan-pieplow-burger-schrder-sawfishspinphotoninterfacefornearunityemittertowaveguidecoupling-2023', 'http://doi.org/10.1364/CLEO_SI.2023.SF1O.6', event.ctrlKey)\"\n     class=\"bibbase doi link\">\n    <span>doi</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"//bibbase.org/network/publication/bopp-plock-turan-pieplow-burger-schrder-sawfishspinphotoninterfacefornearunityemittertowaveguidecoupling-2023\"\n     class=\"bibbase bibbase_page link\">link</a>\n  &nbsp;\n  \n\n  <a href=\"#\"\n     onclick=\"showBib(event); return false;\"\n     class=\"bibbase bibtex link\">bibtex\n    <i class=\"fa fa-caret-down\"></i></a>\n\n  \n  &nbsp;\n  <a class=\"bibbase_abstract_link bibbase link\"\n     href=\"#\"\n     onclick=\"showAbstract(event); return false;\">\n    abstract <i class=\"fa fa-caret-down\"></i></a>\n  \n\n  \n  &nbsp;\n  <span class=\"bibbase_stats_paper\" style=\"color: #777;\">\n    <span>4 downloads</span>\n  </span>\n  \n\n  <!-- <a class=\"bibbase read link hidden\" -->\n  <!--    href=\"javascript:toggleRead('bopp-plock-turan-pieplow-burger-schrder-sawfishspinphotoninterfacefornearunityemittertowaveguidecoupling-2023')\" -->\n  <!--    title=\"Marking this paper as read adds it to your library on BibBase.\" -->\n  <!--    > -->\n  <!--   <i class=\"fa fa-check\"></i>&nbsp; -->\n  <!--   <span>mark as read</span> -->\n  <!-- </a> -->\n\n  &nbsp;\n  \n  \n\n</span>\n\n<div class=\"well well-small bibbase\" data-type=\"bibtex\"\n     style=\"display:none\">\n  <pre style=\"white-space: pre-wrap;\">@inproceedings{bopp_sawfish_2023-1,\n\ttitle = {‘{Sawfish}’ {Spin}-{Photon} {Interface} for {Near}-{Unity} {Emitter}-to-{Waveguide} {Coupling}},\n\tcopyright = {\\&amp;\\#169; 2023 The Author(s)},\n\turl = {https://opg.optica.org/abstract.cfm?uri=CLEO_SI-2023-SF1O.6},\n\tdoi = {10.1364/CLEO_SI.2023.SF1O.6},\n\tabstract = {Interfacing spin-active solid-state quantum emitters or memories with photons remains a challenging task due to photon losses. We propose and demonstrate the ‘Sawfish’ photonic crystal cavity to eliminate photon losses at spin-photon interfaces.},\n\tlanguage = {EN},\n\turldate = {2023-08-29},\n\tbooktitle = {{CLEO} 2023 (2023), paper {SF1O}.6},\n\tpublisher = {Optica Publishing Group},\n\tauthor = {Bopp, Julian M. and Plock, Matthias and Turan, Tim and Pieplow, Gregor and Burger, Sven and Schröder, Tim},\n\tmonth = may,\n\tyear = {2023},\n\tpages = {SF1O.6},\n}\n\n</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" data-type=\"abstract\"\n     style=\"display:none\">\n  Interfacing spin-active solid-state quantum emitters or memories with photons remains a challenging task due to photon losses. We propose and demonstrate the ‘Sawfish’ photonic crystal cavity to eliminate photon losses at spin-photon interfaces.\n</div>\n\n\n</div>\n\n\n  <div class=\"bibbase_paper\" id=\"orphalkobin-unterguggenberger-pregnolato-kemf-matalla-unger-ostermay-pieplow-etal-overcomingspectraldiffusionforenhancedspinphotonentanglementusingnvdefectcentersindiamondnanostructures-2023\">\n  <span class=\"bibbase_paper_titleauthoryear\">\n\n  \n  <span class=\"bibbase_paper_title\">\n  \n  \n  \n  <a href=\"https://opg.optica.org/abstract.cfm?uri=CLEO_FS-2023-FTh1A.6\"\n     onclick=\"return trackOutboundLink('publications', 'click', 'orphalkobin-unterguggenberger-pregnolato-kemf-matalla-unger-ostermay-pieplow-etal-overcomingspectraldiffusionforenhancedspinphotonentanglementusingnvdefectcentersindiamondnanostructures-2023', 'https://opg.optica.org/abstract.cfm?uri=CLEO_FS-2023-FTh1A.6', event);\">\n    Overcoming Spectral Diffusion for Enhanced Spin-Photon Entanglement using NV Defect Centers in Diamond Nanostructures.\n  </a>\n  \n  \n  \n</span>\n\n  <span class=\"bibbase_paper_author\">\n  Orphal-Kobin, L.; Unterguggenberger, K.; Pregnolato, T.; Kemf, N.; Matalla, M.; Unger, R.; Ostermay, I.; Pieplow, G.;  and <a class=\"bibbase author link\" href=\"https://www.physik.hu-berlin.de/en/iqp/publications\">Schröder, T.</a>\n</span>\n\n  \n\n</span>\n\n  In <i>CLEO 2023 (2023), paper FTh1A.6</i>, pages FTh1A.6, May 2023. Optica Publishing Group\n  <span class=\"note\"></span>\n\n<span class=\"bibbase_note\"></span>\n\n<br class=\"bibbase_paper_content\"/>\n\n<span class=\"bibbase_paper_content dontprint\">\n\n  \n  <a href=\"https://opg.optica.org/abstract.cfm?uri=CLEO_FS-2023-FTh1A.6\"\n     onclick=\"log_download('orphalkobin-unterguggenberger-pregnolato-kemf-matalla-unger-ostermay-pieplow-etal-overcomingspectraldiffusionforenhancedspinphotonentanglementusingnvdefectcentersindiamondnanostructures-2023', 'https://opg.optica.org/abstract.cfm?uri=CLEO_FS-2023-FTh1A.6', event.ctrlKey, event)\">\n    <img src=\"//bibbase.org/img/filetypes/link.svg\"\n\t     alt=\"Overcoming Spectral Diffusion for Enhanced Spin-Photon Entanglement using NV Defect Centers in Diamond Nanostructures [link]\"\n       title=\"Paper\"\n\t     class=\"bibbase_icon\"\n         ><span class=\"bibbase_icon_text\">Paper</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"http://doi.org/10.1364/CLEO_FS.2023.FTh1A.6\"\n     onclick=\"log_download('orphalkobin-unterguggenberger-pregnolato-kemf-matalla-unger-ostermay-pieplow-etal-overcomingspectraldiffusionforenhancedspinphotonentanglementusingnvdefectcentersindiamondnanostructures-2023', 'http://doi.org/10.1364/CLEO_FS.2023.FTh1A.6', event.ctrlKey)\"\n     class=\"bibbase doi link\">\n    <span>doi</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"//bibbase.org/network/publication/orphalkobin-unterguggenberger-pregnolato-kemf-matalla-unger-ostermay-pieplow-etal-overcomingspectraldiffusionforenhancedspinphotonentanglementusingnvdefectcentersindiamondnanostructures-2023\"\n     class=\"bibbase bibbase_page link\">link</a>\n  &nbsp;\n  \n\n  <a href=\"#\"\n     onclick=\"showBib(event); return false;\"\n     class=\"bibbase bibtex link\">bibtex\n    <i class=\"fa fa-caret-down\"></i></a>\n\n  \n  &nbsp;\n  <a class=\"bibbase_abstract_link bibbase link\"\n     href=\"#\"\n     onclick=\"showAbstract(event); return false;\">\n    abstract <i class=\"fa fa-caret-down\"></i></a>\n  \n\n  \n  &nbsp;\n  <span class=\"bibbase_stats_paper\" style=\"color: #777;\">\n    <span>4 downloads</span>\n  </span>\n  \n\n  <!-- <a class=\"bibbase read link hidden\" -->\n  <!--    href=\"javascript:toggleRead('orphalkobin-unterguggenberger-pregnolato-kemf-matalla-unger-ostermay-pieplow-etal-overcomingspectraldiffusionforenhancedspinphotonentanglementusingnvdefectcentersindiamondnanostructures-2023')\" -->\n  <!--    title=\"Marking this paper as read adds it to your library on BibBase.\" -->\n  <!--    > -->\n  <!--   <i class=\"fa fa-check\"></i>&nbsp; -->\n  <!--   <span>mark as read</span> -->\n  <!-- </a> -->\n\n  &nbsp;\n  \n  \n\n</span>\n\n<div class=\"well well-small bibbase\" data-type=\"bibtex\"\n     style=\"display:none\">\n  <pre style=\"white-space: pre-wrap;\">@inproceedings{orphal-kobin_overcoming_2023,\n\ttitle = {Overcoming {Spectral} {Diffusion} for {Enhanced} {Spin}-{Photon} {Entanglement} using {NV} {Defect} {Centers} in {Diamond} {Nanostructures}},\n\tcopyright = {\\&amp;\\#169; 2023 The Author(s)},\n\turl = {https://opg.optica.org/abstract.cfm?uri=CLEO_FS-2023-FTh1A.6},\n\tdoi = {10.1364/CLEO_FS.2023.FTh1A.6},\n\tabstract = {Optically coherent NV defect centers in diamond nanostructures are demonstrated using a combination of methods that mitigate spectral diffusion, including sample choice, fabrication, and experimental control. Entanglement rates enhanced by orders of magnitude are proposed.},\n\tlanguage = {EN},\n\turldate = {2023-08-29},\n\tbooktitle = {{CLEO} 2023 (2023), paper {FTh1A}.6},\n\tpublisher = {Optica Publishing Group},\n\tauthor = {Orphal-Kobin, Laura and Unterguggenberger, Kilian and Pregnolato, Tommaso and Kemf, Natalia and Matalla, Mathias and Unger, Ralph-Stephan and Ostermay, Ina and Pieplow, Gregor and Schröder, Tim},\n\tmonth = may,\n\tyear = {2023},\n\tpages = {FTh1A.6},\n}\n\n</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" data-type=\"abstract\"\n     style=\"display:none\">\n  Optically coherent NV defect centers in diamond nanostructures are demonstrated using a combination of methods that mitigate spectral diffusion, including sample choice, fabrication, and experimental control. Entanglement rates enhanced by orders of magnitude are proposed.\n</div>\n\n\n</div>\n\n\n  <div class=\"bibbase_paper\" id=\"munns-orphalkobin-pieplow-schrder-quantumopticswithsolidstatecolorcenters-2023\">\n  <span class=\"bibbase_paper_titleauthoryear\">\n\n  \n  <span class=\"bibbase_paper_title\">\n  \n  \n  \n  <a href=\"https://onlinelibrary.wiley.com/doi/abs/10.1002/9783527837427.ch19\"\n     onclick=\"return trackOutboundLink('publications', 'click', 'munns-orphalkobin-pieplow-schrder-quantumopticswithsolidstatecolorcenters-2023', 'https://onlinelibrary.wiley.com/doi/abs/10.1002/9783527837427.ch19', event);\">\n    Quantum Optics with Solid-State Color Centers.\n  </a>\n  \n  \n  \n</span>\n\n  <span class=\"bibbase_paper_author\">\n  Munns, J. H.; Orphal-Kobin, L.; Pieplow, G.;  and <a class=\"bibbase author link\" href=\"https://www.physik.hu-berlin.de/en/iqp/publications\">Schröder, T.</a>\n</span>\n\n  \n\n</span>\n\n  In <i>Photonic Quantum Technologies</i>, pages 509–562. John Wiley & Sons, Ltd,  2023.\n  <span class=\"note\">Section: 19 _eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1002/9783527837427.ch19</span>\n\n<span class=\"bibbase_note\"></span>\n\n<br class=\"bibbase_paper_content\"/>\n\n<span class=\"bibbase_paper_content dontprint\">\n\n  \n  <a href=\"https://onlinelibrary.wiley.com/doi/abs/10.1002/9783527837427.ch19\"\n     onclick=\"log_download('munns-orphalkobin-pieplow-schrder-quantumopticswithsolidstatecolorcenters-2023', 'https://onlinelibrary.wiley.com/doi/abs/10.1002/9783527837427.ch19', event.ctrlKey, event)\">\n    <img src=\"//bibbase.org/img/filetypes/link.svg\"\n\t     alt=\"Quantum Optics with Solid-State Color Centers [link]\"\n       title=\"Paper\"\n\t     class=\"bibbase_icon\"\n         ><span class=\"bibbase_icon_text\">Paper</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"http://doi.org/10.1002/9783527837427.ch19\"\n     onclick=\"log_download('munns-orphalkobin-pieplow-schrder-quantumopticswithsolidstatecolorcenters-2023', 'http://doi.org/10.1002/9783527837427.ch19', event.ctrlKey)\"\n     class=\"bibbase doi link\">\n    <span>doi</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"//bibbase.org/network/publication/munns-orphalkobin-pieplow-schrder-quantumopticswithsolidstatecolorcenters-2023\"\n     class=\"bibbase bibbase_page link\">link</a>\n  &nbsp;\n  \n\n  <a href=\"#\"\n     onclick=\"showBib(event); return false;\"\n     class=\"bibbase bibtex link\">bibtex\n    <i class=\"fa fa-caret-down\"></i></a>\n\n  \n  &nbsp;\n  <a class=\"bibbase_abstract_link bibbase link\"\n     href=\"#\"\n     onclick=\"showAbstract(event); return false;\">\n    abstract <i class=\"fa fa-caret-down\"></i></a>\n  \n\n  \n  &nbsp;\n  <span class=\"bibbase_stats_paper\" style=\"color: #777;\">\n    <span>4 downloads</span>\n  </span>\n  \n\n  <!-- <a class=\"bibbase read link hidden\" -->\n  <!--    href=\"javascript:toggleRead('munns-orphalkobin-pieplow-schrder-quantumopticswithsolidstatecolorcenters-2023')\" -->\n  <!--    title=\"Marking this paper as read adds it to your library on BibBase.\" -->\n  <!--    > -->\n  <!--   <i class=\"fa fa-check\"></i>&nbsp; -->\n  <!--   <span>mark as read</span> -->\n  <!-- </a> -->\n\n  &nbsp;\n  \n  \n  \n  \n  \n  \n  \n  \n  \n  \n  \n  \n  \n  \n  \n  \n  \n  \n  \n  \n\n</span>\n\n<div class=\"well well-small bibbase\" data-type=\"bibtex\"\n     style=\"display:none\">\n  <pre style=\"white-space: pre-wrap;\">@incollection{munns_quantum_2023,\n\ttitle = {Quantum {Optics} with {Solid}-{State} {Color} {Centers}},\n\tcopyright = {© 2023 Wiley-VCH GmbH},\n\tisbn = {978-3-527-83742-7},\n\turl = {https://onlinelibrary.wiley.com/doi/abs/10.1002/9783527837427.ch19},\n\tabstract = {With the chapter “Quantum Optics with Solid-State Color Centers,” we provide a comprehensive overview of color centers in wide-bandgap materials: We describe their generation and energy level schemes, how they are controlled both optically and via microwaves, and how they are used in quantum optics and technology. The chapter summarizes landmark experiments including applications ranging from single photon generation, over quantum memories, quantum gates, to entanglement generation. We structured the chapter such that the reader has access to a bottom-up introduction but can also directly jump to sections of interest. This work is directed at graduate students up to the principal investigator level.},\n\tlanguage = {en},\n\turldate = {2023-07-26},\n\tbooktitle = {Photonic {Quantum} {Technologies}},\n\tpublisher = {John Wiley \\&amp; Sons, Ltd},\n\tauthor = {Munns, Joseph H.D. and Orphal-Kobin, Laura and Pieplow, Gregor and Schröder, Tim},\n\tyear = {2023},\n\tdoi = {10.1002/9783527837427.ch19},\n\tnote = {Section: 19\n\\_eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1002/9783527837427.ch19},\n\tkeywords = {color centers, diamond, optically active solid-state spin defects, quantum optics, quantum technology, review, silicon carbide, single photon emitters, wide-bandgap materials},\n\tpages = {509--562},\n}\n\n</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" data-type=\"abstract\"\n     style=\"display:none\">\n  With the chapter “Quantum Optics with Solid-State Color Centers,” we provide a comprehensive overview of color centers in wide-bandgap materials: We describe their generation and energy level schemes, how they are controlled both optically and via microwaves, and how they are used in quantum optics and technology. The chapter summarizes landmark experiments including applications ranging from single photon generation, over quantum memories, quantum gates, to entanglement generation. We structured the chapter such that the reader has access to a bottom-up introduction but can also directly jump to sections of interest. This work is directed at graduate students up to the principal investigator level.\n</div>\n\n\n</div>\n\n\n  <div class=\"bibbase_paper\" id=\"benyoucef-photonicquantumtechnologiesscienceandapplications-2023\">\n  <span class=\"bibbase_paper_titleauthoryear\">\n\n  \n  <span class=\"bibbase_paper_title\">\n  \n  \n  \n  Photonic Quantum Technologies: Science and Applications.\n  \n  \n  \n</span>\n\n  <span class=\"bibbase_paper_author\">\n  Benyoucef, M.\n</span>\n\n  \n\n</span>\n\n  Wiley, July 2023.\n  <span class=\"note\">Google-Books-ID: GFGAzgEACAAJ</span>\n\n<span class=\"bibbase_note\"></span>\n\n<br class=\"bibbase_paper_content\"/>\n\n<span class=\"bibbase_paper_content dontprint\">\n\n  \n\n  \n\n  \n  <a href=\"//bibbase.org/network/publication/benyoucef-photonicquantumtechnologiesscienceandapplications-2023\"\n     class=\"bibbase bibbase_page link\">link</a>\n  &nbsp;\n  \n\n  <a href=\"#\"\n     onclick=\"showBib(event); return false;\"\n     class=\"bibbase bibtex link\">bibtex\n    <i class=\"fa fa-caret-down\"></i></a>\n\n  \n  &nbsp;\n  <a class=\"bibbase_abstract_link bibbase link\"\n     href=\"#\"\n     onclick=\"showAbstract(event); return false;\">\n    abstract <i class=\"fa fa-caret-down\"></i></a>\n  \n\n  \n\n  <!-- <a class=\"bibbase read link hidden\" -->\n  <!--    href=\"javascript:toggleRead('benyoucef-photonicquantumtechnologiesscienceandapplications-2023')\" -->\n  <!--    title=\"Marking this paper as read adds it to your library on BibBase.\" -->\n  <!--    > -->\n  <!--   <i class=\"fa fa-check\"></i>&nbsp; -->\n  <!--   <span>mark as read</span> -->\n  <!-- </a> -->\n\n  &nbsp;\n  \n  \n  \n  \n  \n  \n\n</span>\n\n<div class=\"well well-small bibbase\" data-type=\"bibtex\"\n     style=\"display:none\">\n  <pre style=\"white-space: pre-wrap;\">@book{benyoucef_photonic_2023,\n\ttitle = {Photonic {Quantum} {Technologies}: {Science} and {Applications}},\n\tisbn = {978-3-527-41412-3},\n\tshorttitle = {Photonic {Quantum} {Technologies}},\n\tabstract = {Brings together top-level research results to enable the development of practical quantum devices In Photonic Quantum Technologies: Science and Applications, the editor Mohamed Benyoucef and a team of distinguished scientists from different disciplines deliver an authoritative, one-stop overview of up-to-date research on various quantum systems. This unique book reviews the state-of-the-art research in photonic quantum technologies and bridges the fundamentals of the field with applications to provide readers from academia and industry, in one-location resource, with cutting-edge knowledge they need to have to understand and develop practical quantum systems for application in e.g., secure quantum communication, quantum metrology, and quantum computing. The book also addresses fundamental and engineering challenges en route to workable quantum devices and ways to circumvent or overcome them. Readers will also find:  A thorough introduction to the fundamentals of quantum technologies, including discussions of the second quantum revolution (by Nobel Laureate Alain Aspect), solid-state quantum optics, and non-classical light and quantum entanglement Comprehensive explorations of emerging quantum technologies and their practical applications, including quantum repeaters, satellite-based quantum communication, quantum networks, silicon quantum photonics, integrated quantum systems, and future vision Practical discussions of quantum technologies with artificial atoms, color centers, 2D materials, molecules, atoms, ions, atom-atom entanglement, and optical clocks  Perfect for molecular and solid-state physicists, Photonic Quantum Technologies: Science and Applications will also benefit industrial and academic researchers in photonics and quantum optics, graduate students in the field; engineers, chemists, and computer and material scientists.},\n\tlanguage = {en},\n\tpublisher = {Wiley},\n\tauthor = {Benyoucef, Mohamed},\n\tmonth = jul,\n\tyear = {2023},\n\tnote = {Google-Books-ID: GFGAzgEACAAJ},\n\tkeywords = {Science / Physics / Electromagnetism, Science / Physics / Optics \\&amp; Light},\n}\n\n</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" data-type=\"abstract\"\n     style=\"display:none\">\n  Brings together top-level research results to enable the development of practical quantum devices In Photonic Quantum Technologies: Science and Applications, the editor Mohamed Benyoucef and a team of distinguished scientists from different disciplines deliver an authoritative, one-stop overview of up-to-date research on various quantum systems. This unique book reviews the state-of-the-art research in photonic quantum technologies and bridges the fundamentals of the field with applications to provide readers from academia and industry, in one-location resource, with cutting-edge knowledge they need to have to understand and develop practical quantum systems for application in e.g., secure quantum communication, quantum metrology, and quantum computing. The book also addresses fundamental and engineering challenges en route to workable quantum devices and ways to circumvent or overcome them. Readers will also find: A thorough introduction to the fundamentals of quantum technologies, including discussions of the second quantum revolution (by Nobel Laureate Alain Aspect), solid-state quantum optics, and non-classical light and quantum entanglement Comprehensive explorations of emerging quantum technologies and their practical applications, including quantum repeaters, satellite-based quantum communication, quantum networks, silicon quantum photonics, integrated quantum systems, and future vision Practical discussions of quantum technologies with artificial atoms, color centers, 2D materials, molecules, atoms, ions, atom-atom entanglement, and optical clocks Perfect for molecular and solid-state physicists, Photonic Quantum Technologies: Science and Applications will also benefit industrial and academic researchers in photonics and quantum optics, graduate students in the field; engineers, chemists, and computer and material scientists.\n</div>\n\n\n</div>\n\n\n  <div class=\"bibbase_paper\" id=\"orphalkobin-unterguggenberger-pregnolato-kemf-matalla-unger-ostermay-pieplow-etal-opticallycoherentnitrogenvacancydefectcentersindiamondnanostructures-2023\">\n  <span class=\"bibbase_paper_titleauthoryear\">\n\n  \n  <span class=\"bibbase_paper_title\">\n  \n  \n  \n  <a href=\"https://link.aps.org/doi/10.1103/PhysRevX.13.011042\"\n     onclick=\"return trackOutboundLink('publications', 'click', 'orphalkobin-unterguggenberger-pregnolato-kemf-matalla-unger-ostermay-pieplow-etal-opticallycoherentnitrogenvacancydefectcentersindiamondnanostructures-2023', 'https://link.aps.org/doi/10.1103/PhysRevX.13.011042', event);\">\n    Optically Coherent Nitrogen-Vacancy Defect Centers in Diamond Nanostructures.\n  </a>\n  \n  \n  \n</span>\n\n  <span class=\"bibbase_paper_author\">\n  Orphal-Kobin, L.; Unterguggenberger, K.; Pregnolato, T.; Kemf, N.; Matalla, M.; Unger, R.; Ostermay, I.; Pieplow, G.;  and <a class=\"bibbase author link\" href=\"https://www.physik.hu-berlin.de/en/iqp/publications\">Schröder, T.</a>\n</span>\n\n  \n\n</span>\n\n  <i>Physical Review X</i>, 13(1): 011042. March 2023.\n  <span class=\"note\">Publisher: American Physical Society</span>\n\n<span class=\"bibbase_note\"></span>\n\n<br class=\"bibbase_paper_content\"/>\n\n<span class=\"bibbase_paper_content dontprint\">\n\n  \n  <a href=\"https://link.aps.org/doi/10.1103/PhysRevX.13.011042\"\n     onclick=\"log_download('orphalkobin-unterguggenberger-pregnolato-kemf-matalla-unger-ostermay-pieplow-etal-opticallycoherentnitrogenvacancydefectcentersindiamondnanostructures-2023', 'https://link.aps.org/doi/10.1103/PhysRevX.13.011042', event.ctrlKey, event)\">\n    <img src=\"//bibbase.org/img/filetypes/link.svg\"\n\t     alt=\"Optically Coherent Nitrogen-Vacancy Defect Centers in Diamond Nanostructures [link]\"\n       title=\"Paper\"\n\t     class=\"bibbase_icon\"\n         ><span class=\"bibbase_icon_text\">Paper</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"http://doi.org/10.1103/PhysRevX.13.011042\"\n     onclick=\"log_download('orphalkobin-unterguggenberger-pregnolato-kemf-matalla-unger-ostermay-pieplow-etal-opticallycoherentnitrogenvacancydefectcentersindiamondnanostructures-2023', 'http://doi.org/10.1103/PhysRevX.13.011042', event.ctrlKey)\"\n     class=\"bibbase doi link\">\n    <span>doi</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"//bibbase.org/network/publication/orphalkobin-unterguggenberger-pregnolato-kemf-matalla-unger-ostermay-pieplow-etal-opticallycoherentnitrogenvacancydefectcentersindiamondnanostructures-2023\"\n     class=\"bibbase bibbase_page link\">link</a>\n  &nbsp;\n  \n\n  <a href=\"#\"\n     onclick=\"showBib(event); return false;\"\n     class=\"bibbase bibtex link\">bibtex\n    <i class=\"fa fa-caret-down\"></i></a>\n\n  \n  &nbsp;\n  <a class=\"bibbase_abstract_link bibbase link\"\n     href=\"#\"\n     onclick=\"showAbstract(event); return false;\">\n    abstract <i class=\"fa fa-caret-down\"></i></a>\n  \n\n  \n  &nbsp;\n  <span class=\"bibbase_stats_paper\" style=\"color: #777;\">\n    <span>6 downloads</span>\n  </span>\n  \n\n  <!-- <a class=\"bibbase read link hidden\" -->\n  <!--    href=\"javascript:toggleRead('orphalkobin-unterguggenberger-pregnolato-kemf-matalla-unger-ostermay-pieplow-etal-opticallycoherentnitrogenvacancydefectcentersindiamondnanostructures-2023')\" -->\n  <!--    title=\"Marking this paper as read adds it to your library on BibBase.\" -->\n  <!--    > -->\n  <!--   <i class=\"fa fa-check\"></i>&nbsp; -->\n  <!--   <span>mark as read</span> -->\n  <!-- </a> -->\n\n  &nbsp;\n  \n  \n\n</span>\n\n<div class=\"well well-small bibbase\" data-type=\"bibtex\"\n     style=\"display:none\">\n  <pre style=\"white-space: pre-wrap;\">@article{orphal-kobin_optically_2023,\n\ttitle = {Optically {Coherent} {Nitrogen}-{Vacancy} {Defect} {Centers} in {Diamond} {Nanostructures}},\n\tvolume = {13},\n\turl = {https://link.aps.org/doi/10.1103/PhysRevX.13.011042},\n\tdoi = {10.1103/PhysRevX.13.011042},\n\tabstract = {Optically active solid-state spin defects have the potential to become a versatile resource for quantum information processing applications. Nitrogen-vacancy defect centers (NV) in diamond act as quantum memories and can be interfaced with coherent photons as demonstrated in entanglement protocols. However, particularly in diamond nanostructures, the effect of spectral diffusion leads to optical decoherence hindering entanglement generation. In this work, we present strategies to significantly reduce the electric noise in diamond nanostructures. We demonstrate single NVs in nanopillars exhibiting a lifetime-limited linewidth on a timescale of one second and long-term spectral stability with an inhomogeneous linewidth as low as 150 MHz over three minutes. Excitation power and energy-dependent measurements in combination with nanoscopic Monte Carlo simulations contribute to a better understanding of the impact of bulk and surface defects on the NV’s spectral properties. Finally, we propose an entanglement protocol for nanostructure-coupled NVs providing entanglement generation rates up to hundreds of kHz.},\n\tnumber = {1},\n\turldate = {2023-04-17},\n\tjournal = {Physical Review X},\n\tauthor = {Orphal-Kobin, Laura and Unterguggenberger, Kilian and Pregnolato, Tommaso and Kemf, Natalia and Matalla, Mathias and Unger, Ralph-Stephan and Ostermay, Ina and Pieplow, Gregor and Schröder, Tim},\n\tmonth = mar,\n\tyear = {2023},\n\tnote = {Publisher: American Physical Society},\n\tpages = {011042},\n}\n\n</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" data-type=\"abstract\"\n     style=\"display:none\">\n  Optically active solid-state spin defects have the potential to become a versatile resource for quantum information processing applications. Nitrogen-vacancy defect centers (NV) in diamond act as quantum memories and can be interfaced with coherent photons as demonstrated in entanglement protocols. However, particularly in diamond nanostructures, the effect of spectral diffusion leads to optical decoherence hindering entanglement generation. In this work, we present strategies to significantly reduce the electric noise in diamond nanostructures. We demonstrate single NVs in nanopillars exhibiting a lifetime-limited linewidth on a timescale of one second and long-term spectral stability with an inhomogeneous linewidth as low as 150 MHz over three minutes. Excitation power and energy-dependent measurements in combination with nanoscopic Monte Carlo simulations contribute to a better understanding of the impact of bulk and surface defects on the NV’s spectral properties. Finally, we propose an entanglement protocol for nanostructure-coupled NVs providing entanglement generation rates up to hundreds of kHz.\n</div>\n\n\n</div>\n\n\n\n\n\n    </div>\n  </div>\n\n  <div class=\"bibbase_group_whole\" id=\"group_2022\">\n    <div class=\"bibbase_group\"\n      onclick=\"toggleGroup('group_2022')\"\n      onkeypress=\"toggleGroup('group_2022')\"\n      tabindex=\"0\">\n      <i class=\"fa fa-angle-down bibbase_group_head_icon\"></i>&nbsp;\n      <span>2022</span>\n      <span class=\"bibbase_group_count\">\n        \n        (1)\n        \n      </span>\n    </div>\n    <div class=\"bibbase_group_body\">\n      \n  \n  <div class=\"bibbase_paper\" id=\"schrder-martinez-bopp-kleinert-conradi-sensorformeasuringamagneticfield-2022\">\n  <span class=\"bibbase_paper_titleauthoryear\">\n\n  \n  <span class=\"bibbase_paper_title\">\n  \n  \n  \n  <a href=\"https://patents.google.com/patent/EP4099041A1/en\"\n     onclick=\"return trackOutboundLink('publications', 'click', 'schrder-martinez-bopp-kleinert-conradi-sensorformeasuringamagneticfield-2022', 'https://patents.google.com/patent/EP4099041A1/en', event);\">\n    Sensor for measuring a magnetic field.\n  </a>\n  \n  \n  \n</span>\n\n  <span class=\"bibbase_paper_author\">\n  <a class=\"bibbase author link\" href=\"https://www.physik.hu-berlin.de/en/iqp/publications\">Schröder, T.</a>; MARTINEZ, F. P.; BOPP, J.; KLEINERT, M.;  and CONRADI, H.\n</span>\n\n  \n\n</span>\n\n  December 2022.<!-- NOTE FROM BIBBASE: This entry has an invalid bibtex entry type: patent. Therefore, we don't know how to render it properly. Please consider fixing this. -->\n  <span class=\"note\"></span>\n\n<span class=\"bibbase_note\"></span>\n\n<br class=\"bibbase_paper_content\"/>\n\n<span class=\"bibbase_paper_content dontprint\">\n\n  \n  <a href=\"https://patents.google.com/patent/EP4099041A1/en\"\n     onclick=\"log_download('schrder-martinez-bopp-kleinert-conradi-sensorformeasuringamagneticfield-2022', 'https://patents.google.com/patent/EP4099041A1/en', event.ctrlKey, event)\">\n    <img src=\"//bibbase.org/img/filetypes/link.svg\"\n\t     alt=\"Sensor for measuring a magnetic field [link]\"\n       title=\"Paper\"\n\t     class=\"bibbase_icon\"\n         ><span class=\"bibbase_icon_text\">Paper</span></a>\n  &nbsp;\n  \n\n  \n\n  \n  <a href=\"//bibbase.org/network/publication/schrder-martinez-bopp-kleinert-conradi-sensorformeasuringamagneticfield-2022\"\n     class=\"bibbase bibbase_page link\">link</a>\n  &nbsp;\n  \n\n  <a href=\"#\"\n     onclick=\"showBib(event); return false;\"\n     class=\"bibbase bibtex link\">bibtex\n    <i class=\"fa fa-caret-down\"></i></a>\n\n  \n  &nbsp;\n  <a class=\"bibbase_abstract_link bibbase link\"\n     href=\"#\"\n     onclick=\"showAbstract(event); return false;\">\n    abstract <i class=\"fa fa-caret-down\"></i></a>\n  \n\n  \n  &nbsp;\n  <span class=\"bibbase_stats_paper\" style=\"color: #777;\">\n    <span>2 downloads</span>\n  </span>\n  \n\n  <!-- <a class=\"bibbase read link hidden\" -->\n  <!--    href=\"javascript:toggleRead('schrder-martinez-bopp-kleinert-conradi-sensorformeasuringamagneticfield-2022')\" -->\n  <!--    title=\"Marking this paper as read adds it to your library on BibBase.\" -->\n  <!--    > -->\n  <!--   <i class=\"fa fa-check\"></i>&nbsp; -->\n  <!--   <span>mark as read</span> -->\n  <!-- </a> -->\n\n  &nbsp;\n  \n  \n  \n  \n  \n  \n  \n  \n  \n  \n  \n  \n\n</span>\n\n<div class=\"well well-small bibbase\" data-type=\"bibtex\"\n     style=\"display:none\">\n  <pre style=\"white-space: pre-wrap;\">@patent{schroder_sensor_2022,\n\ttitle = {Sensor for measuring a magnetic field},\n\turl = {https://patents.google.com/patent/EP4099041A1/en},\n\tabstract = {An embodiment of the invention relates to a sensor comprising a sensor element (10) for measuring a magnetic field, the sensor element (10) comprising a set of at least two first input ports (Il), a set of at least two exit ports (E) each of which is connected to one of the first input ports (I1) via a corresponding first beam path (B1), a set of at least two second input ports (12) each of which is connected to a second beam path (B2), wherein the first beam paths (B1) extend through a common plane (CP) located inside the sensor element (10), said plane (CP) comprising a plurality of magneto-optically responsive defect centers, wherein the second beam paths (B2) also extend through said common plane (CP), but are angled with respect to the first beam paths (B1) such that a plurality of intersections between the first and second beam paths (B2) is defined, and wherein each intersection forms a sensor pixel (P) located at at least one of said magneto-optically responsive defect centers.},\n\tnationality = {EP},\n\tassignee = {Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV, Humboldt Universitaet zu Berlin},\n\tnumber = {EP4099041A1},\n\turldate = {2023-08-08},\n\tauthor = {Schröder, Tim and MARTINEZ, Felipe PERONA and BOPP, Julian and KLEINERT, Moritz and CONRADI, Hauke},\n\tmonth = dec,\n\tyear = {2022},\n\tkeywords = {beam paths, emitter, radiation, sensor, sensor element},\n}\n\n</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" data-type=\"abstract\"\n     style=\"display:none\">\n  An embodiment of the invention relates to a sensor comprising a sensor element (10) for measuring a magnetic field, the sensor element (10) comprising a set of at least two first input ports (Il), a set of at least two exit ports (E) each of which is connected to one of the first input ports (I1) via a corresponding first beam path (B1), a set of at least two second input ports (12) each of which is connected to a second beam path (B2), wherein the first beam paths (B1) extend through a common plane (CP) located inside the sensor element (10), said plane (CP) comprising a plurality of magneto-optically responsive defect centers, wherein the second beam paths (B2) also extend through said common plane (CP), but are angled with respect to the first beam paths (B1) such that a plurality of intersections between the first and second beam paths (B2) is defined, and wherein each intersection forms a sensor pixel (P) located at at least one of said magneto-optically responsive defect centers.\n</div>\n\n\n</div>\n\n\n\n\n\n    </div>\n  </div>\n\n  <div class=\"bibbase_group_whole\" id=\"group_2021\">\n    <div class=\"bibbase_group\"\n      onclick=\"toggleGroup('group_2021')\"\n      onkeypress=\"toggleGroup('group_2021')\"\n      tabindex=\"0\">\n      <i class=\"fa fa-angle-down bibbase_group_head_icon\"></i>&nbsp;\n      <span>2021</span>\n      <span class=\"bibbase_group_count\">\n        \n        (4)\n        \n      </span>\n    </div>\n    <div class=\"bibbase_group_body\">\n      \n  \n  <div class=\"bibbase_paper\" id=\"bates-day-smallwood-owen-schrder-bielejec-ulbricht-cundiff-usingsiliconvacancycentersindiamondtoprobethefullstraintensor-2021\">\n  <span class=\"bibbase_paper_titleauthoryear\">\n\n  \n  <span class=\"bibbase_paper_title\">\n  \n  \n  \n  <a href=\"https://aip.scitation.org/doi/full/10.1063/5.0052613\"\n     onclick=\"return trackOutboundLink('publications', 'click', 'bates-day-smallwood-owen-schrder-bielejec-ulbricht-cundiff-usingsiliconvacancycentersindiamondtoprobethefullstraintensor-2021', 'https://aip.scitation.org/doi/full/10.1063/5.0052613', event);\">\n    Using silicon-vacancy centers in diamond to probe the full strain tensor.\n  </a>\n  \n  \n  \n</span>\n\n  <span class=\"bibbase_paper_author\">\n  Bates, K. M.; Day, M. W.; Smallwood, C. L.; Owen, R. C.; <a class=\"bibbase author link\" href=\"https://www.physik.hu-berlin.de/en/iqp/publications\">Schröder, T.</a>; Bielejec, E.; Ulbricht, R.;  and Cundiff, S. T.\n</span>\n\n  \n\n</span>\n\n  <i>Journal of Applied Physics</i>, 130(2): 024301. July 2021.\n  <span class=\"note\">Publisher: American Institute of Physics</span>\n\n<span class=\"bibbase_note\"></span>\n\n<br class=\"bibbase_paper_content\"/>\n\n<span class=\"bibbase_paper_content dontprint\">\n\n  \n  <a href=\"https://aip.scitation.org/doi/full/10.1063/5.0052613\"\n     onclick=\"log_download('bates-day-smallwood-owen-schrder-bielejec-ulbricht-cundiff-usingsiliconvacancycentersindiamondtoprobethefullstraintensor-2021', 'https://aip.scitation.org/doi/full/10.1063/5.0052613', event.ctrlKey, event)\">\n    <img src=\"//bibbase.org/img/filetypes/link.svg\"\n\t     alt=\"Using silicon-vacancy centers in diamond to probe the full strain tensor [link]\"\n       title=\"Paper\"\n\t     class=\"bibbase_icon\"\n         ><span class=\"bibbase_icon_text\">Paper</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"http://doi.org/10.1063/5.0052613\"\n     onclick=\"log_download('bates-day-smallwood-owen-schrder-bielejec-ulbricht-cundiff-usingsiliconvacancycentersindiamondtoprobethefullstraintensor-2021', 'http://doi.org/10.1063/5.0052613', event.ctrlKey)\"\n     class=\"bibbase doi link\">\n    <span>doi</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"//bibbase.org/network/publication/bates-day-smallwood-owen-schrder-bielejec-ulbricht-cundiff-usingsiliconvacancycentersindiamondtoprobethefullstraintensor-2021\"\n     class=\"bibbase bibbase_page link\">link</a>\n  &nbsp;\n  \n\n  <a href=\"#\"\n     onclick=\"showBib(event); return false;\"\n     class=\"bibbase bibtex link\">bibtex\n    <i class=\"fa fa-caret-down\"></i></a>\n\n  \n  &nbsp;\n  <a class=\"bibbase_abstract_link bibbase link\"\n     href=\"#\"\n     onclick=\"showAbstract(event); return false;\">\n    abstract <i class=\"fa fa-caret-down\"></i></a>\n  \n\n  \n  &nbsp;\n  <span class=\"bibbase_stats_paper\" style=\"color: #777;\">\n    <span>5 downloads</span>\n  </span>\n  \n\n  <!-- <a class=\"bibbase read link hidden\" -->\n  <!--    href=\"javascript:toggleRead('bates-day-smallwood-owen-schrder-bielejec-ulbricht-cundiff-usingsiliconvacancycentersindiamondtoprobethefullstraintensor-2021')\" -->\n  <!--    title=\"Marking this paper as read adds it to your library on BibBase.\" -->\n  <!--    > -->\n  <!--   <i class=\"fa fa-check\"></i>&nbsp; -->\n  <!--   <span>mark as read</span> -->\n  <!-- </a> -->\n\n  &nbsp;\n  \n  \n\n</span>\n\n<div class=\"well well-small bibbase\" data-type=\"bibtex\"\n     style=\"display:none\">\n  <pre style=\"white-space: pre-wrap;\">@article{bates_using_2021,\n\ttitle = {Using silicon-vacancy centers in diamond to probe the full strain tensor},\n\tvolume = {130},\n\tissn = {0021-8979},\n\turl = {https://aip.scitation.org/doi/full/10.1063/5.0052613},\n\tdoi = {10.1063/5.0052613},\n\tabstract = {An ensemble of silicon vacancy (\nSiV\n−\nSiV−\n) centers in diamond is probed using two-pulse correlation spectroscopy and multidimensional coherent spectroscopy. Two main distinct families of \nSiV\n−\nSiV−\n centers are identified, and these families are paired with two orientation groups by comparing spectra from different linear polarizations of the incident laser. By tracking the peak centers in the measured spectra, the full diamond strain tensor is calculated local to the laser spot. Measurements are made at multiple points on the sample surface, and variations in the strain tensor are observed.},\n\tnumber = {2},\n\turldate = {2022-08-03},\n\tjournal = {Journal of Applied Physics},\n\tauthor = {Bates, Kelsey M. and Day, Matthew W. and Smallwood, Christopher L. and Owen, Rachel C. and Schröder, Tim and Bielejec, Edward and Ulbricht, Ronald and Cundiff, Steven T.},\n\tmonth = jul,\n\tyear = {2021},\n\tnote = {Publisher: American Institute of Physics},\n\tpages = {024301},\n}\n\n</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" data-type=\"abstract\"\n     style=\"display:none\">\n  An ensemble of silicon vacancy ( SiV − SiV− ) centers in diamond is probed using two-pulse correlation spectroscopy and multidimensional coherent spectroscopy. Two main distinct families of SiV − SiV− centers are identified, and these families are paired with two orientation groups by comparing spectra from different linear polarizations of the incident laser. By tracking the peak centers in the measured spectra, the full diamond strain tensor is calculated local to the laser spot. Measurements are made at multiple points on the sample surface, and variations in the strain tensor are observed.\n</div>\n\n\n</div>\n\n\n  <div class=\"bibbase_paper\" id=\"laucht-hohls-ubbelohde-gonzalezzalba-reilly-stobbe-schrder-scarlino-etal-roadmaponquantumnanotechnologies-2021\">\n  <span class=\"bibbase_paper_titleauthoryear\">\n\n  \n  <span class=\"bibbase_paper_title\">\n  \n  \n  \n  <a href=\"https://doi.org/10.1088/1361-6528/abb333\"\n     onclick=\"return trackOutboundLink('publications', 'click', 'laucht-hohls-ubbelohde-gonzalezzalba-reilly-stobbe-schrder-scarlino-etal-roadmaponquantumnanotechnologies-2021', 'https://doi.org/10.1088/1361-6528/abb333', event);\">\n    Roadmap on quantum nanotechnologies.\n  </a>\n  \n  \n  \n</span>\n\n  <span class=\"bibbase_paper_author\">\n  Laucht, A.; Hohls, F.; Ubbelohde, N.; Gonzalez-Zalba, M. F.; Reilly, D. J.; Stobbe, S.; <a class=\"bibbase author link\" href=\"https://www.physik.hu-berlin.de/en/iqp/publications\">Schröder, T.</a>; Scarlino, P.; Koski, J. V.; Dzurak, A.; Yang, C.; Yoneda, J.; Kuemmeth, F.; Bluhm, H.; Pla, J.; Hill, C.; Salfi, J.; Oiwa, A.; Muhonen, J. T.; Verhagen, E.; LaHaye, M. D.; Kim, H. H.; Tsen, A. W.; Culcer, D.; Geresdi, A.; Mol, J. A.; Mohan, V.; Jain, P. K.;  and Baugh, J.\n</span>\n\n  \n\n</span>\n\n  <i>Nanotechnology</i>, 32(16): 162003. February 2021.\n  <span class=\"note\">Publisher: IOP Publishing</span>\n\n<span class=\"bibbase_note\"></span>\n\n<br class=\"bibbase_paper_content\"/>\n\n<span class=\"bibbase_paper_content dontprint\">\n\n  \n  <a href=\"https://doi.org/10.1088/1361-6528/abb333\"\n     onclick=\"log_download('laucht-hohls-ubbelohde-gonzalezzalba-reilly-stobbe-schrder-scarlino-etal-roadmaponquantumnanotechnologies-2021', 'https://doi.org/10.1088/1361-6528/abb333', event.ctrlKey, event)\">\n    <img src=\"//bibbase.org/img/filetypes/link.svg\"\n\t     alt=\"Roadmap on quantum nanotechnologies [link]\"\n       title=\"Paper\"\n\t     class=\"bibbase_icon\"\n         ><span class=\"bibbase_icon_text\">Paper</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"http://doi.org/10.1088/1361-6528/abb333\"\n     onclick=\"log_download('laucht-hohls-ubbelohde-gonzalezzalba-reilly-stobbe-schrder-scarlino-etal-roadmaponquantumnanotechnologies-2021', 'http://doi.org/10.1088/1361-6528/abb333', event.ctrlKey)\"\n     class=\"bibbase doi link\">\n    <span>doi</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"//bibbase.org/network/publication/laucht-hohls-ubbelohde-gonzalezzalba-reilly-stobbe-schrder-scarlino-etal-roadmaponquantumnanotechnologies-2021\"\n     class=\"bibbase bibbase_page link\">link</a>\n  &nbsp;\n  \n\n  <a href=\"#\"\n     onclick=\"showBib(event); return false;\"\n     class=\"bibbase bibtex link\">bibtex\n    <i class=\"fa fa-caret-down\"></i></a>\n\n  \n  &nbsp;\n  <a class=\"bibbase_abstract_link bibbase link\"\n     href=\"#\"\n     onclick=\"showAbstract(event); return false;\">\n    abstract <i class=\"fa fa-caret-down\"></i></a>\n  \n\n  \n  &nbsp;\n  <span class=\"bibbase_stats_paper\" style=\"color: #777;\">\n    <span>11 downloads</span>\n  </span>\n  \n\n  <!-- <a class=\"bibbase read link hidden\" -->\n  <!--    href=\"javascript:toggleRead('laucht-hohls-ubbelohde-gonzalezzalba-reilly-stobbe-schrder-scarlino-etal-roadmaponquantumnanotechnologies-2021')\" -->\n  <!--    title=\"Marking this paper as read adds it to your library on BibBase.\" -->\n  <!--    > -->\n  <!--   <i class=\"fa fa-check\"></i>&nbsp; -->\n  <!--   <span>mark as read</span> -->\n  <!-- </a> -->\n\n  &nbsp;\n  \n  \n\n</span>\n\n<div class=\"well well-small bibbase\" data-type=\"bibtex\"\n     style=\"display:none\">\n  <pre style=\"white-space: pre-wrap;\">@article{laucht_roadmap_2021,\n\ttitle = {Roadmap on quantum nanotechnologies},\n\tvolume = {32},\n\tissn = {0957-4484},\n\turl = {https://doi.org/10.1088/1361-6528/abb333},\n\tdoi = {10.1088/1361-6528/abb333},\n\tabstract = {Quantum phenomena are typically observable at length and time scales smaller than those of our everyday experience, often involving individual particles or excitations. The past few decades have seen a revolution in the ability to structure matter at the nanoscale, and experiments at the single particle level have become commonplace. This has opened wide new avenues for exploring and harnessing quantum mechanical effects in condensed matter. These quantum phenomena, in turn, have the potential to revolutionize the way we communicate, compute and probe the nanoscale world. Here, we review developments in key areas of quantum research in light of the nanotechnologies that enable them, with a view to what the future holds. Materials and devices with nanoscale features are used for quantum metrology and sensing, as building blocks for quantum computing, and as sources and detectors for quantum communication. They enable explorations of quantum behaviour and unconventional states in nano- and opto-mechanical systems, low-dimensional systems, molecular devices, nano-plasmonics, quantum electrodynamics, scanning tunnelling microscopy, and more. This rapidly expanding intersection of nanotechnology and quantum science/technology is mutually beneficial to both fields, laying claim to some of the most exciting scientific leaps of the last decade, with more on the horizon.},\n\tlanguage = {en},\n\tnumber = {16},\n\turldate = {2022-08-03},\n\tjournal = {Nanotechnology},\n\tauthor = {Laucht, Arne and Hohls, Frank and Ubbelohde, Niels and Gonzalez-Zalba, M. Fernando and Reilly, David J. and Stobbe, Søren and Schröder, Tim and Scarlino, Pasquale and Koski, Jonne V. and Dzurak, Andrew and Yang, Chih-Hwan and Yoneda, Jun and Kuemmeth, Ferdinand and Bluhm, Hendrik and Pla, Jarryd and Hill, Charles and Salfi, Joe and Oiwa, Akira and Muhonen, Juha T. and Verhagen, Ewold and LaHaye, M. D. and Kim, Hyun Ho and Tsen, Adam W. and Culcer, Dimitrie and Geresdi, Attila and Mol, Jan A. and Mohan, Varun and Jain, Prashant K. and Baugh, Jonathan},\n\tmonth = feb,\n\tyear = {2021},\n\tnote = {Publisher: IOP Publishing},\n\tpages = {162003},\n}\n\n</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" data-type=\"abstract\"\n     style=\"display:none\">\n  Quantum phenomena are typically observable at length and time scales smaller than those of our everyday experience, often involving individual particles or excitations. The past few decades have seen a revolution in the ability to structure matter at the nanoscale, and experiments at the single particle level have become commonplace. This has opened wide new avenues for exploring and harnessing quantum mechanical effects in condensed matter. These quantum phenomena, in turn, have the potential to revolutionize the way we communicate, compute and probe the nanoscale world. Here, we review developments in key areas of quantum research in light of the nanotechnologies that enable them, with a view to what the future holds. Materials and devices with nanoscale features are used for quantum metrology and sensing, as building blocks for quantum computing, and as sources and detectors for quantum communication. They enable explorations of quantum behaviour and unconventional states in nano- and opto-mechanical systems, low-dimensional systems, molecular devices, nano-plasmonics, quantum electrodynamics, scanning tunnelling microscopy, and more. This rapidly expanding intersection of nanotechnology and quantum science/technology is mutually beneficial to both fields, laying claim to some of the most exciting scientific leaps of the last decade, with more on the horizon.\n</div>\n\n\n</div>\n\n\n  <div class=\"bibbase_paper\" id=\"smallwood-ulbricht-day-schrder-bates-autry-diederich-bielejec-etal-hiddensiliconvacancycentersindiamond-2021\">\n  <span class=\"bibbase_paper_titleauthoryear\">\n\n  \n  <span class=\"bibbase_paper_title\">\n  \n  \n  \n  <a href=\"https://link.aps.org/doi/10.1103/PhysRevLett.126.213601\"\n     onclick=\"return trackOutboundLink('publications', 'click', 'smallwood-ulbricht-day-schrder-bates-autry-diederich-bielejec-etal-hiddensiliconvacancycentersindiamond-2021', 'https://link.aps.org/doi/10.1103/PhysRevLett.126.213601', event);\">\n    Hidden Silicon-Vacancy Centers in Diamond.\n  </a>\n  \n  \n  \n</span>\n\n  <span class=\"bibbase_paper_author\">\n  Smallwood, C. L.; Ulbricht, R.; Day, M. W.; <a class=\"bibbase author link\" href=\"https://www.physik.hu-berlin.de/en/iqp/publications\">Schröder, T.</a>; Bates, K. M.; Autry, T. M.; Diederich, G.; Bielejec, E.; Siemens, M. E.;  and Cundiff, S. T.\n</span>\n\n  \n\n</span>\n\n  <i>Physical Review Letters</i>, 126(21): 213601. May 2021.\n  <span class=\"note\">Publisher: American Physical Society</span>\n\n<span class=\"bibbase_note\"></span>\n\n<br class=\"bibbase_paper_content\"/>\n\n<span class=\"bibbase_paper_content dontprint\">\n\n  \n  <a href=\"https://link.aps.org/doi/10.1103/PhysRevLett.126.213601\"\n     onclick=\"log_download('smallwood-ulbricht-day-schrder-bates-autry-diederich-bielejec-etal-hiddensiliconvacancycentersindiamond-2021', 'https://link.aps.org/doi/10.1103/PhysRevLett.126.213601', event.ctrlKey, event)\">\n    <img src=\"//bibbase.org/img/filetypes/link.svg\"\n\t     alt=\"Hidden Silicon-Vacancy Centers in Diamond [link]\"\n       title=\"Paper\"\n\t     class=\"bibbase_icon\"\n         ><span class=\"bibbase_icon_text\">Paper</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"http://doi.org/10.1103/PhysRevLett.126.213601\"\n     onclick=\"log_download('smallwood-ulbricht-day-schrder-bates-autry-diederich-bielejec-etal-hiddensiliconvacancycentersindiamond-2021', 'http://doi.org/10.1103/PhysRevLett.126.213601', event.ctrlKey)\"\n     class=\"bibbase doi link\">\n    <span>doi</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"//bibbase.org/network/publication/smallwood-ulbricht-day-schrder-bates-autry-diederich-bielejec-etal-hiddensiliconvacancycentersindiamond-2021\"\n     class=\"bibbase bibbase_page link\">link</a>\n  &nbsp;\n  \n\n  <a href=\"#\"\n     onclick=\"showBib(event); return false;\"\n     class=\"bibbase bibtex link\">bibtex\n    <i class=\"fa fa-caret-down\"></i></a>\n\n  \n  &nbsp;\n  <a class=\"bibbase_abstract_link bibbase link\"\n     href=\"#\"\n     onclick=\"showAbstract(event); return false;\">\n    abstract <i class=\"fa fa-caret-down\"></i></a>\n  \n\n  \n  &nbsp;\n  <span class=\"bibbase_stats_paper\" style=\"color: #777;\">\n    <span>10 downloads</span>\n  </span>\n  \n\n  <!-- <a class=\"bibbase read link hidden\" -->\n  <!--    href=\"javascript:toggleRead('smallwood-ulbricht-day-schrder-bates-autry-diederich-bielejec-etal-hiddensiliconvacancycentersindiamond-2021')\" -->\n  <!--    title=\"Marking this paper as read adds it to your library on BibBase.\" -->\n  <!--    > -->\n  <!--   <i class=\"fa fa-check\"></i>&nbsp; -->\n  <!--   <span>mark as read</span> -->\n  <!-- </a> -->\n\n  &nbsp;\n  \n  \n\n</span>\n\n<div class=\"well well-small bibbase\" data-type=\"bibtex\"\n     style=\"display:none\">\n  <pre style=\"white-space: pre-wrap;\">@article{smallwood_hidden_2021,\n\ttitle = {Hidden {Silicon}-{Vacancy} {Centers} in {Diamond}},\n\tvolume = {126},\n\turl = {https://link.aps.org/doi/10.1103/PhysRevLett.126.213601},\n\tdoi = {10.1103/PhysRevLett.126.213601},\n\tabstract = {We characterize a high-density sample of negatively charged silicon-vacancy (SiV−) centers in diamond using collinear optical multidimensional coherent spectroscopy. By comparing the results of complementary signal detection schemes, we identify a hidden population of SiV− centers that is not typically observed in photoluminescence and which exhibits significant spectral inhomogeneity and extended electronic T2 times. The phenomenon is likely caused by strain, indicating a potential mechanism for controlling electric coherence in color-center-based quantum devices.},\n\tnumber = {21},\n\turldate = {2022-08-03},\n\tjournal = {Physical Review Letters},\n\tauthor = {Smallwood, Christopher L. and Ulbricht, Ronald and Day, Matthew W. and Schröder, Tim and Bates, Kelsey M. and Autry, Travis M. and Diederich, Geoffrey and Bielejec, Edward and Siemens, Mark E. and Cundiff, Steven T.},\n\tmonth = may,\n\tyear = {2021},\n\tnote = {Publisher: American Physical Society},\n\tpages = {213601},\n}\n\n</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" data-type=\"abstract\"\n     style=\"display:none\">\n  We characterize a high-density sample of negatively charged silicon-vacancy (SiV−) centers in diamond using collinear optical multidimensional coherent spectroscopy. By comparing the results of complementary signal detection schemes, we identify a hidden population of SiV− centers that is not typically observed in photoluminescence and which exhibits significant spectral inhomogeneity and extended electronic T2 times. The phenomenon is likely caused by strain, indicating a potential mechanism for controlling electric coherence in color-center-based quantum devices.\n</div>\n\n\n</div>\n\n\n  <div class=\"bibbase_paper\" id=\"torun-schneider-hammerschmidt-burger-munns-schrder-optimizeddiamondinvertednanoconesforenhancedcolorcentertofibercoupling-2021\">\n  <span class=\"bibbase_paper_titleauthoryear\">\n\n  \n  <span class=\"bibbase_paper_title\">\n  \n  \n  \n  <a href=\"https://aip.scitation.org/doi/full/10.1063/5.0050338\"\n     onclick=\"return trackOutboundLink('publications', 'click', 'torun-schneider-hammerschmidt-burger-munns-schrder-optimizeddiamondinvertednanoconesforenhancedcolorcentertofibercoupling-2021', 'https://aip.scitation.org/doi/full/10.1063/5.0050338', event);\">\n    Optimized diamond inverted nanocones for enhanced color center to fiber coupling.\n  </a>\n  \n  \n  \n</span>\n\n  <span class=\"bibbase_paper_author\">\n  Torun, C. G.; Schneider, P.; Hammerschmidt, M.; Burger, S.; Munns, J. H. D.;  and <a class=\"bibbase author link\" href=\"https://www.physik.hu-berlin.de/en/iqp/publications\">Schröder, T.</a>\n</span>\n\n  \n\n</span>\n\n  <i>Applied Physics Letters</i>, 118(23): 234002. June 2021.\n  <span class=\"note\">Publisher: American Institute of Physics</span>\n\n<span class=\"bibbase_note\"></span>\n\n<br class=\"bibbase_paper_content\"/>\n\n<span class=\"bibbase_paper_content dontprint\">\n\n  \n  <a href=\"https://aip.scitation.org/doi/full/10.1063/5.0050338\"\n     onclick=\"log_download('torun-schneider-hammerschmidt-burger-munns-schrder-optimizeddiamondinvertednanoconesforenhancedcolorcentertofibercoupling-2021', 'https://aip.scitation.org/doi/full/10.1063/5.0050338', event.ctrlKey, event)\">\n    <img src=\"//bibbase.org/img/filetypes/link.svg\"\n\t     alt=\"Optimized diamond inverted nanocones for enhanced color center to fiber coupling [link]\"\n       title=\"Paper\"\n\t     class=\"bibbase_icon\"\n         ><span class=\"bibbase_icon_text\">Paper</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"http://doi.org/10.1063/5.0050338\"\n     onclick=\"log_download('torun-schneider-hammerschmidt-burger-munns-schrder-optimizeddiamondinvertednanoconesforenhancedcolorcentertofibercoupling-2021', 'http://doi.org/10.1063/5.0050338', event.ctrlKey)\"\n     class=\"bibbase doi link\">\n    <span>doi</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"//bibbase.org/network/publication/torun-schneider-hammerschmidt-burger-munns-schrder-optimizeddiamondinvertednanoconesforenhancedcolorcentertofibercoupling-2021\"\n     class=\"bibbase bibbase_page link\">link</a>\n  &nbsp;\n  \n\n  <a href=\"#\"\n     onclick=\"showBib(event); return false;\"\n     class=\"bibbase bibtex link\">bibtex\n    <i class=\"fa fa-caret-down\"></i></a>\n\n  \n  &nbsp;\n  <a class=\"bibbase_abstract_link bibbase link\"\n     href=\"#\"\n     onclick=\"showAbstract(event); return false;\">\n    abstract <i class=\"fa fa-caret-down\"></i></a>\n  \n\n  \n  &nbsp;\n  <span class=\"bibbase_stats_paper\" style=\"color: #777;\">\n    <span>3 downloads</span>\n  </span>\n  \n\n  <!-- <a class=\"bibbase read link hidden\" -->\n  <!--    href=\"javascript:toggleRead('torun-schneider-hammerschmidt-burger-munns-schrder-optimizeddiamondinvertednanoconesforenhancedcolorcentertofibercoupling-2021')\" -->\n  <!--    title=\"Marking this paper as read adds it to your library on BibBase.\" -->\n  <!--    > -->\n  <!--   <i class=\"fa fa-check\"></i>&nbsp; -->\n  <!--   <span>mark as read</span> -->\n  <!-- </a> -->\n\n  &nbsp;\n  \n  \n\n</span>\n\n<div class=\"well well-small bibbase\" data-type=\"bibtex\"\n     style=\"display:none\">\n  <pre style=\"white-space: pre-wrap;\">@article{torun_optimized_2021,\n\ttitle = {Optimized diamond inverted nanocones for enhanced color center to fiber coupling},\n\tvolume = {118},\n\tissn = {0003-6951},\n\turl = {https://aip.scitation.org/doi/full/10.1063/5.0050338},\n\tdoi = {10.1063/5.0050338},\n\tabstract = {Nanostructures can be used for boosting the light outcoupling of color centers in diamond; however, the fiber coupling performance of these nanostructures is rarely investigated. Here, we use a finite element method for computing the emission from color centers in inverted nanocones and the overlap of this emission with the propagation mode in a single-mode fiber. Using different figures of merit, the inverted nanocone parameters are optimized to obtain maximal fiber coupling efficiency, free-space collection efficiency, or rate enhancement. The optimized inverted nanocone designs show promising results with 66\\% fiber coupling or 83\\% free-space coupling efficiency at the tin-vacancy center zero-phonon line wavelength of 619 nm. Moreover, when evaluated for broadband performance, the optimized designs show 55\\% and 76\\% for fiber coupling and free-space efficiencies, respectively, for collecting the full tin-vacancy emission spectrum at room temperature. An analysis of fabrication insensitivity indicates that these nanostructures are robust against imperfections. For maximum emission rate into a fiber mode, a design with a Purcell factor of 2.34 is identified. Finally, possible improvements offered by a hybrid inverted nanocone, formed by patterning into two different materials, are investigated and increase the achievable fiber coupling efficiency to 71\\%.},\n\tnumber = {23},\n\turldate = {2021-10-03},\n\tjournal = {Applied Physics Letters},\n\tauthor = {Torun, Cem Güney and Schneider, Philipp-Immanuel and Hammerschmidt, Martin and Burger, Sven and Munns, Joseph H. D. and Schröder, Tim},\n\tmonth = jun,\n\tyear = {2021},\n\tnote = {Publisher: American Institute of Physics},\n\tpages = {234002},\n}\n</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" data-type=\"abstract\"\n     style=\"display:none\">\n  Nanostructures can be used for boosting the light outcoupling of color centers in diamond; however, the fiber coupling performance of these nanostructures is rarely investigated. Here, we use a finite element method for computing the emission from color centers in inverted nanocones and the overlap of this emission with the propagation mode in a single-mode fiber. Using different figures of merit, the inverted nanocone parameters are optimized to obtain maximal fiber coupling efficiency, free-space collection efficiency, or rate enhancement. The optimized inverted nanocone designs show promising results with 66% fiber coupling or 83% free-space coupling efficiency at the tin-vacancy center zero-phonon line wavelength of 619 nm. Moreover, when evaluated for broadband performance, the optimized designs show 55% and 76% for fiber coupling and free-space efficiencies, respectively, for collecting the full tin-vacancy emission spectrum at room temperature. An analysis of fabrication insensitivity indicates that these nanostructures are robust against imperfections. For maximum emission rate into a fiber mode, a design with a Purcell factor of 2.34 is identified. Finally, possible improvements offered by a hybrid inverted nanocone, formed by patterning into two different materials, are investigated and increase the achievable fiber coupling efficiency to 71%.\n</div>\n\n\n</div>\n\n\n\n\n\n    </div>\n  </div>\n\n  <div class=\"bibbase_group_whole\" id=\"group_2020\">\n    <div class=\"bibbase_group\"\n      onclick=\"toggleGroup('group_2020')\"\n      onkeypress=\"toggleGroup('group_2020')\"\n      tabindex=\"0\">\n      <i class=\"fa fa-angle-down bibbase_group_head_icon\"></i>&nbsp;\n      <span>2020</span>\n      <span class=\"bibbase_group_count\">\n        \n        (2)\n        \n      </span>\n    </div>\n    <div class=\"bibbase_group_body\">\n      \n  \n  <div class=\"bibbase_paper\" id=\"borregaard-pichler-schrder-lukin-lodahl-srensen-onewayquantumrepeaterbasedonneardeterministicphotonemitterinterfaces-2020\">\n  <span class=\"bibbase_paper_titleauthoryear\">\n\n  \n  <span class=\"bibbase_paper_title\">\n  \n  \n  \n  <a href=\"https://link.aps.org/doi/10.1103/PhysRevX.10.021071\"\n     onclick=\"return trackOutboundLink('publications', 'click', 'borregaard-pichler-schrder-lukin-lodahl-srensen-onewayquantumrepeaterbasedonneardeterministicphotonemitterinterfaces-2020', 'https://link.aps.org/doi/10.1103/PhysRevX.10.021071', event);\">\n    One-Way Quantum Repeater Based on Near-Deterministic Photon-Emitter Interfaces.\n  </a>\n  \n  \n  \n</span>\n\n  <span class=\"bibbase_paper_author\">\n  Borregaard, J.; Pichler, H.; <a class=\"bibbase author link\" href=\"https://www.physik.hu-berlin.de/en/iqp/publications\">Schröder, T.</a>; Lukin, M. D.; Lodahl, P.;  and Sørensen, A. S.\n</span>\n\n  \n\n</span>\n\n  <i>Physical Review X</i>, 10(2): 021071. June 2020.\n  <span class=\"note\">Publisher: American Physical Society</span>\n\n<span class=\"bibbase_note\"></span>\n\n<br class=\"bibbase_paper_content\"/>\n\n<span class=\"bibbase_paper_content dontprint\">\n\n  \n  <a href=\"https://link.aps.org/doi/10.1103/PhysRevX.10.021071\"\n     onclick=\"log_download('borregaard-pichler-schrder-lukin-lodahl-srensen-onewayquantumrepeaterbasedonneardeterministicphotonemitterinterfaces-2020', 'https://link.aps.org/doi/10.1103/PhysRevX.10.021071', event.ctrlKey, event)\">\n    <img src=\"//bibbase.org/img/filetypes/link.svg\"\n\t     alt=\"One-Way Quantum Repeater Based on Near-Deterministic Photon-Emitter Interfaces [link]\"\n       title=\"Paper\"\n\t     class=\"bibbase_icon\"\n         ><span class=\"bibbase_icon_text\">Paper</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"http://doi.org/10.1103/PhysRevX.10.021071\"\n     onclick=\"log_download('borregaard-pichler-schrder-lukin-lodahl-srensen-onewayquantumrepeaterbasedonneardeterministicphotonemitterinterfaces-2020', 'http://doi.org/10.1103/PhysRevX.10.021071', event.ctrlKey)\"\n     class=\"bibbase doi link\">\n    <span>doi</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"//bibbase.org/network/publication/borregaard-pichler-schrder-lukin-lodahl-srensen-onewayquantumrepeaterbasedonneardeterministicphotonemitterinterfaces-2020\"\n     class=\"bibbase bibbase_page link\">link</a>\n  &nbsp;\n  \n\n  <a href=\"#\"\n     onclick=\"showBib(event); return false;\"\n     class=\"bibbase bibtex link\">bibtex\n    <i class=\"fa fa-caret-down\"></i></a>\n\n  \n  &nbsp;\n  <a class=\"bibbase_abstract_link bibbase link\"\n     href=\"#\"\n     onclick=\"showAbstract(event); return false;\">\n    abstract <i class=\"fa fa-caret-down\"></i></a>\n  \n\n  \n  &nbsp;\n  <span class=\"bibbase_stats_paper\" style=\"color: #777;\">\n    <span>4 downloads</span>\n  </span>\n  \n\n  <!-- <a class=\"bibbase read link hidden\" -->\n  <!--    href=\"javascript:toggleRead('borregaard-pichler-schrder-lukin-lodahl-srensen-onewayquantumrepeaterbasedonneardeterministicphotonemitterinterfaces-2020')\" -->\n  <!--    title=\"Marking this paper as read adds it to your library on BibBase.\" -->\n  <!--    > -->\n  <!--   <i class=\"fa fa-check\"></i>&nbsp; -->\n  <!--   <span>mark as read</span> -->\n  <!-- </a> -->\n\n  &nbsp;\n  \n  \n\n</span>\n\n<div class=\"well well-small bibbase\" data-type=\"bibtex\"\n     style=\"display:none\">\n  <pre style=\"white-space: pre-wrap;\">@article{borregaard_one-way_2020,\n\ttitle = {One-{Way} {Quantum} {Repeater} {Based} on {Near}-{Deterministic} {Photon}-{Emitter} {Interfaces}},\n\tvolume = {10},\n\turl = {https://link.aps.org/doi/10.1103/PhysRevX.10.021071},\n\tdoi = {10.1103/PhysRevX.10.021071},\n\tabstract = {We propose a novel one-way quantum repeater architecture based on photonic tree-cluster states. Encoding a qubit in a photonic tree cluster protects the information from transmission loss and enables long-range quantum communication through a chain of repeater stations. As opposed to conventional approaches that are limited by the two-way communication time, the overall transmission rate of the current quantum repeater protocol is determined by the local processing time enabling very high communication rates. We further show that such a repeater can be constructed with as little as two stationary qubits and one quantum emitter per repeater station, which significantly increases the experimental feasibility. We discuss potential implementations with diamond defect centers and semiconductor quantum dots efficiently coupled to photonic nanostructures and outline how such systems may be integrated into repeater stations.},\n\tnumber = {2},\n\turldate = {2022-08-03},\n\tjournal = {Physical Review X},\n\tauthor = {Borregaard, Johannes and Pichler, Hannes and Schröder, Tim and Lukin, Mikhail D. and Lodahl, Peter and Sørensen, Anders S.},\n\tmonth = jun,\n\tyear = {2020},\n\tnote = {Publisher: American Physical Society},\n\tpages = {021071},\n}\n\n</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" data-type=\"abstract\"\n     style=\"display:none\">\n  We propose a novel one-way quantum repeater architecture based on photonic tree-cluster states. Encoding a qubit in a photonic tree cluster protects the information from transmission loss and enables long-range quantum communication through a chain of repeater stations. As opposed to conventional approaches that are limited by the two-way communication time, the overall transmission rate of the current quantum repeater protocol is determined by the local processing time enabling very high communication rates. We further show that such a repeater can be constructed with as little as two stationary qubits and one quantum emitter per repeater station, which significantly increases the experimental feasibility. We discuss potential implementations with diamond defect centers and semiconductor quantum dots efficiently coupled to photonic nanostructures and outline how such systems may be integrated into repeater stations.\n</div>\n\n\n</div>\n\n\n  <div class=\"bibbase_paper\" id=\"pregnolato-chu-schrder-schott-wieck-ludwig-lodahl-rotenberg-deterministicpositioningofnanophotonicwaveguidesaroundsingleselfassembledquantumdots-2020\">\n  <span class=\"bibbase_paper_titleauthoryear\">\n\n  \n  <span class=\"bibbase_paper_title\">\n  \n  \n  \n  <a href=\"https://aip.scitation.org/doi/full/10.1063/1.5117888\"\n     onclick=\"return trackOutboundLink('publications', 'click', 'pregnolato-chu-schrder-schott-wieck-ludwig-lodahl-rotenberg-deterministicpositioningofnanophotonicwaveguidesaroundsingleselfassembledquantumdots-2020', 'https://aip.scitation.org/doi/full/10.1063/1.5117888', event);\">\n    Deterministic positioning of nanophotonic waveguides around single self-assembled quantum dots.\n  </a>\n  \n  \n  \n</span>\n\n  <span class=\"bibbase_paper_author\">\n  Pregnolato, T.; Chu, X.; <a class=\"bibbase author link\" href=\"https://www.physik.hu-berlin.de/en/iqp/publications\">Schröder, T.</a>; Schott, R.; Wieck, A. D.; Ludwig, A.; Lodahl, P.;  and Rotenberg, N.\n</span>\n\n  \n\n</span>\n\n  <i>APL Photonics</i>, 5(8): 086101. August 2020.\n  <span class=\"note\">Publisher: American Institute of Physics</span>\n\n<span class=\"bibbase_note\"></span>\n\n<br class=\"bibbase_paper_content\"/>\n\n<span class=\"bibbase_paper_content dontprint\">\n\n  \n  <a href=\"https://aip.scitation.org/doi/full/10.1063/1.5117888\"\n     onclick=\"log_download('pregnolato-chu-schrder-schott-wieck-ludwig-lodahl-rotenberg-deterministicpositioningofnanophotonicwaveguidesaroundsingleselfassembledquantumdots-2020', 'https://aip.scitation.org/doi/full/10.1063/1.5117888', event.ctrlKey, event)\">\n    <img src=\"//bibbase.org/img/filetypes/link.svg\"\n\t     alt=\"Deterministic positioning of nanophotonic waveguides around single self-assembled quantum dots [link]\"\n       title=\"Paper\"\n\t     class=\"bibbase_icon\"\n         ><span class=\"bibbase_icon_text\">Paper</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"http://doi.org/10.1063/1.5117888\"\n     onclick=\"log_download('pregnolato-chu-schrder-schott-wieck-ludwig-lodahl-rotenberg-deterministicpositioningofnanophotonicwaveguidesaroundsingleselfassembledquantumdots-2020', 'http://doi.org/10.1063/1.5117888', event.ctrlKey)\"\n     class=\"bibbase doi link\">\n    <span>doi</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"//bibbase.org/network/publication/pregnolato-chu-schrder-schott-wieck-ludwig-lodahl-rotenberg-deterministicpositioningofnanophotonicwaveguidesaroundsingleselfassembledquantumdots-2020\"\n     class=\"bibbase bibbase_page link\">link</a>\n  &nbsp;\n  \n\n  <a href=\"#\"\n     onclick=\"showBib(event); return false;\"\n     class=\"bibbase bibtex link\">bibtex\n    <i class=\"fa fa-caret-down\"></i></a>\n\n  \n  &nbsp;\n  <a class=\"bibbase_abstract_link bibbase link\"\n     href=\"#\"\n     onclick=\"showAbstract(event); return false;\">\n    abstract <i class=\"fa fa-caret-down\"></i></a>\n  \n\n  \n  &nbsp;\n  <span class=\"bibbase_stats_paper\" style=\"color: #777;\">\n    <span>1 download</span>\n  </span>\n  \n\n  <!-- <a class=\"bibbase read link hidden\" -->\n  <!--    href=\"javascript:toggleRead('pregnolato-chu-schrder-schott-wieck-ludwig-lodahl-rotenberg-deterministicpositioningofnanophotonicwaveguidesaroundsingleselfassembledquantumdots-2020')\" -->\n  <!--    title=\"Marking this paper as read adds it to your library on BibBase.\" -->\n  <!--    > -->\n  <!--   <i class=\"fa fa-check\"></i>&nbsp; -->\n  <!--   <span>mark as read</span> -->\n  <!-- </a> -->\n\n  &nbsp;\n  \n  \n\n</span>\n\n<div class=\"well well-small bibbase\" data-type=\"bibtex\"\n     style=\"display:none\">\n  <pre style=\"white-space: pre-wrap;\">@article{pregnolato_deterministic_2020,\n\ttitle = {Deterministic positioning of nanophotonic waveguides around single self-assembled quantum dots},\n\tvolume = {5},\n\turl = {https://aip.scitation.org/doi/full/10.1063/1.5117888},\n\tdoi = {10.1063/1.5117888},\n\tabstract = {The capability to embed self-assembled quantum dots (QDs) at predefined positions in nanophotonic structures is key to the development of complex quantum-photonic architectures. Here, we demonstrate that QDs can be deterministically positioned in nanophotonic waveguides by pre-locating QDs relative to a global reference frame using micro-photoluminescence (μPL) spectroscopy. After nanofabrication, μPL images reveal misalignments between the central axis of the waveguide and the embedded QD of only (9 ± 46) nm and (1 ± 33) nm for QDs embedded in undoped and doped membranes, respectively. A priori knowledge of the QD positions allows us to study the spectral changes introduced by nanofabrication. We record average spectral shifts ranging from 0.1 nm to 1.1 nm, indicating that the fabrication-induced shifts can generally be compensated by electrical or thermal tuning of the QDs. Finally, we quantify the effects of the nanofabrication on the polarizability, the permanent dipole moment, and the emission frequency at vanishing electric field of different QD charge states, finding that these changes are constant down to QD-surface separations of only 70 nm. Consequently, our approach deterministically integrates QDs into nanophotonic waveguides whose light-fields contain nanoscale structure and whose group index varies at the nanometer level.},\n\tnumber = {8},\n\turldate = {2022-08-03},\n\tjournal = {APL Photonics},\n\tauthor = {Pregnolato, T. and Chu, X.-L. and Schröder, T. and Schott, R. and Wieck, A. D. and Ludwig, A. and Lodahl, P. and Rotenberg, N.},\n\tmonth = aug,\n\tyear = {2020},\n\tnote = {Publisher: American Institute of Physics},\n\tpages = {086101},\n}\n\n</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" data-type=\"abstract\"\n     style=\"display:none\">\n  The capability to embed self-assembled quantum dots (QDs) at predefined positions in nanophotonic structures is key to the development of complex quantum-photonic architectures. Here, we demonstrate that QDs can be deterministically positioned in nanophotonic waveguides by pre-locating QDs relative to a global reference frame using micro-photoluminescence (μPL) spectroscopy. After nanofabrication, μPL images reveal misalignments between the central axis of the waveguide and the embedded QD of only (9 ± 46) nm and (1 ± 33) nm for QDs embedded in undoped and doped membranes, respectively. A priori knowledge of the QD positions allows us to study the spectral changes introduced by nanofabrication. We record average spectral shifts ranging from 0.1 nm to 1.1 nm, indicating that the fabrication-induced shifts can generally be compensated by electrical or thermal tuning of the QDs. Finally, we quantify the effects of the nanofabrication on the polarizability, the permanent dipole moment, and the emission frequency at vanishing electric field of different QD charge states, finding that these changes are constant down to QD-surface separations of only 70 nm. Consequently, our approach deterministically integrates QDs into nanophotonic waveguides whose light-fields contain nanoscale structure and whose group index varies at the nanometer level.\n</div>\n\n\n</div>\n\n\n\n\n\n    </div>\n  </div>\n\n  <div class=\"bibbase_group_whole\" id=\"group_2019\">\n    <div class=\"bibbase_group\"\n      onclick=\"toggleGroup('group_2019')\"\n      onkeypress=\"toggleGroup('group_2019')\"\n      tabindex=\"0\">\n      <i class=\"fa fa-angle-down bibbase_group_head_icon\"></i>&nbsp;\n      <span>2019</span>\n      <span class=\"bibbase_group_count\">\n        \n        (2)\n        \n      </span>\n    </div>\n    <div class=\"bibbase_group_body\">\n      \n  \n  <div class=\"bibbase_paper\" id=\"bersin-walsh-mouradian-trusheim-schrder-englund-individualcontrolandreadoutofqubitsinasubdiffractionvolume-2019\">\n  <span class=\"bibbase_paper_titleauthoryear\">\n\n  \n  <span class=\"bibbase_paper_title\">\n  \n  \n  \n  <a href=\"https://www.nature.com/articles/s41534-019-0154-y\"\n     onclick=\"return trackOutboundLink('publications', 'click', 'bersin-walsh-mouradian-trusheim-schrder-englund-individualcontrolandreadoutofqubitsinasubdiffractionvolume-2019', 'https://www.nature.com/articles/s41534-019-0154-y', event);\">\n    Individual control and readout of qubits in a sub-diffraction volume.\n  </a>\n  \n  \n  \n</span>\n\n  <span class=\"bibbase_paper_author\">\n  Bersin, E.; Walsh, M.; Mouradian, S. L.; Trusheim, M. E.; <a class=\"bibbase author link\" href=\"https://www.physik.hu-berlin.de/en/iqp/publications\">Schröder, T.</a>;  and Englund, D.\n</span>\n\n  \n\n</span>\n\n  <i>npj Quantum Information</i>, 5(1): 1–6. May 2019.\n  <span class=\"note\">Number: 1 Publisher: Nature Publishing Group</span>\n\n<span class=\"bibbase_note\"></span>\n\n<br class=\"bibbase_paper_content\"/>\n\n<span class=\"bibbase_paper_content dontprint\">\n\n  \n  <a href=\"https://www.nature.com/articles/s41534-019-0154-y\"\n     onclick=\"log_download('bersin-walsh-mouradian-trusheim-schrder-englund-individualcontrolandreadoutofqubitsinasubdiffractionvolume-2019', 'https://www.nature.com/articles/s41534-019-0154-y', event.ctrlKey, event)\">\n    <img src=\"//bibbase.org/img/filetypes/link.svg\"\n\t     alt=\"Individual control and readout of qubits in a sub-diffraction volume [link]\"\n       title=\"Paper\"\n\t     class=\"bibbase_icon\"\n         ><span class=\"bibbase_icon_text\">Paper</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"http://doi.org/10.1038/s41534-019-0154-y\"\n     onclick=\"log_download('bersin-walsh-mouradian-trusheim-schrder-englund-individualcontrolandreadoutofqubitsinasubdiffractionvolume-2019', 'http://doi.org/10.1038/s41534-019-0154-y', event.ctrlKey)\"\n     class=\"bibbase doi link\">\n    <span>doi</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"//bibbase.org/network/publication/bersin-walsh-mouradian-trusheim-schrder-englund-individualcontrolandreadoutofqubitsinasubdiffractionvolume-2019\"\n     class=\"bibbase bibbase_page link\">link</a>\n  &nbsp;\n  \n\n  <a href=\"#\"\n     onclick=\"showBib(event); return false;\"\n     class=\"bibbase bibtex link\">bibtex\n    <i class=\"fa fa-caret-down\"></i></a>\n\n  \n  &nbsp;\n  <a class=\"bibbase_abstract_link bibbase link\"\n     href=\"#\"\n     onclick=\"showAbstract(event); return false;\">\n    abstract <i class=\"fa fa-caret-down\"></i></a>\n  \n\n  \n  &nbsp;\n  <span class=\"bibbase_stats_paper\" style=\"color: #777;\">\n    <span>4 downloads</span>\n  </span>\n  \n\n  <!-- <a class=\"bibbase read link hidden\" -->\n  <!--    href=\"javascript:toggleRead('bersin-walsh-mouradian-trusheim-schrder-englund-individualcontrolandreadoutofqubitsinasubdiffractionvolume-2019')\" -->\n  <!--    title=\"Marking this paper as read adds it to your library on BibBase.\" -->\n  <!--    > -->\n  <!--   <i class=\"fa fa-check\"></i>&nbsp; -->\n  <!--   <span>mark as read</span> -->\n  <!-- </a> -->\n\n  &nbsp;\n  \n  \n  \n  \n  \n  \n  \n  \n  \n  \n  \n  \n\n</span>\n\n<div class=\"well well-small bibbase\" data-type=\"bibtex\"\n     style=\"display:none\">\n  <pre style=\"white-space: pre-wrap;\">@article{bersin_individual_2019,\n\ttitle = {Individual control and readout of qubits in a sub-diffraction volume},\n\tvolume = {5},\n\tcopyright = {2019 The Author(s)},\n\tissn = {2056-6387},\n\turl = {https://www.nature.com/articles/s41534-019-0154-y},\n\tdoi = {10.1038/s41534-019-0154-y},\n\tabstract = {Medium-scale ensembles of coupled qubits offer a platform for near-term quantum technologies as well as studies of many-body physics. A central challenge for coherent control of such systems is the ability to measure individual quantum states without disturbing nearby qubits. Here, we demonstrate the measurement of individual qubit states in a sub-diffraction cluster by selectively exciting spectrally distinguishable nitrogen vacancy centers. We perform super-resolution localization of single centers with nanometer spatial resolution, as well as individual control and readout of spin populations. These measurements indicate a readout-induced crosstalk on non-addressed qubits below 4 × 10−2. This approach opens the door to high-speed control and measurement of qubit registers in mesoscopic spin clusters, with applications ranging from entanglement-enhanced sensors to error-corrected qubit registers to multiplexed quantum repeater nodes.},\n\tlanguage = {en},\n\tnumber = {1},\n\turldate = {2022-08-03},\n\tjournal = {npj Quantum Information},\n\tauthor = {Bersin, Eric and Walsh, Michael and Mouradian, Sara L. and Trusheim, Matthew E. and Schröder, Tim and Englund, Dirk},\n\tmonth = may,\n\tyear = {2019},\n\tnote = {Number: 1\nPublisher: Nature Publishing Group},\n\tkeywords = {Atom optics, Quantum information, Quantum optics, Single photons and quantum effects, Sub-wavelength optics},\n\tpages = {1--6},\n}\n\n</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" data-type=\"abstract\"\n     style=\"display:none\">\n  Medium-scale ensembles of coupled qubits offer a platform for near-term quantum technologies as well as studies of many-body physics. A central challenge for coherent control of such systems is the ability to measure individual quantum states without disturbing nearby qubits. Here, we demonstrate the measurement of individual qubit states in a sub-diffraction cluster by selectively exciting spectrally distinguishable nitrogen vacancy centers. We perform super-resolution localization of single centers with nanometer spatial resolution, as well as individual control and readout of spin populations. These measurements indicate a readout-induced crosstalk on non-addressed qubits below 4 × 10−2. This approach opens the door to high-speed control and measurement of qubit registers in mesoscopic spin clusters, with applications ranging from entanglement-enhanced sensors to error-corrected qubit registers to multiplexed quantum repeater nodes.\n</div>\n\n\n</div>\n\n\n  <div class=\"bibbase_paper\" id=\"ding-appel-javadi-zhou-lbl-sllner-schott-papon-etal-coherentopticalcontrolofaquantumdotspinqubitinawaveguidebasedspinphotoninterface-2019\">\n  <span class=\"bibbase_paper_titleauthoryear\">\n\n  \n  <span class=\"bibbase_paper_title\">\n  \n  \n  \n  <a href=\"https://link.aps.org/doi/10.1103/PhysRevApplied.11.031002\"\n     onclick=\"return trackOutboundLink('publications', 'click', 'ding-appel-javadi-zhou-lbl-sllner-schott-papon-etal-coherentopticalcontrolofaquantumdotspinqubitinawaveguidebasedspinphotoninterface-2019', 'https://link.aps.org/doi/10.1103/PhysRevApplied.11.031002', event);\">\n    Coherent Optical Control of a Quantum-Dot Spin-Qubit in a Waveguide-Based Spin-Photon Interface.\n  </a>\n  \n  \n  \n</span>\n\n  <span class=\"bibbase_paper_author\">\n  Ding, D.; Appel, M. H.; Javadi, A.; Zhou, X.; Löbl, M. C.; Söllner, I.; Schott, R.; Papon, C.; Pregnolato, T.; Midolo, L.; Wieck, A. D.; Ludwig, A.; Warburton, R. J.; <a class=\"bibbase author link\" href=\"https://www.physik.hu-berlin.de/en/iqp/publications\">Schröder, T.</a>;  and Lodahl, P.\n</span>\n\n  \n\n</span>\n\n  <i>Physical Review Applied</i>, 11(3): 031002. March 2019.\n  <span class=\"note\">Publisher: American Physical Society</span>\n\n<span class=\"bibbase_note\"></span>\n\n<br class=\"bibbase_paper_content\"/>\n\n<span class=\"bibbase_paper_content dontprint\">\n\n  \n  <a href=\"https://link.aps.org/doi/10.1103/PhysRevApplied.11.031002\"\n     onclick=\"log_download('ding-appel-javadi-zhou-lbl-sllner-schott-papon-etal-coherentopticalcontrolofaquantumdotspinqubitinawaveguidebasedspinphotoninterface-2019', 'https://link.aps.org/doi/10.1103/PhysRevApplied.11.031002', event.ctrlKey, event)\">\n    <img src=\"//bibbase.org/img/filetypes/link.svg\"\n\t     alt=\"Coherent Optical Control of a Quantum-Dot Spin-Qubit in a Waveguide-Based Spin-Photon Interface [link]\"\n       title=\"Paper\"\n\t     class=\"bibbase_icon\"\n         ><span class=\"bibbase_icon_text\">Paper</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"http://doi.org/10.1103/PhysRevApplied.11.031002\"\n     onclick=\"log_download('ding-appel-javadi-zhou-lbl-sllner-schott-papon-etal-coherentopticalcontrolofaquantumdotspinqubitinawaveguidebasedspinphotoninterface-2019', 'http://doi.org/10.1103/PhysRevApplied.11.031002', event.ctrlKey)\"\n     class=\"bibbase doi link\">\n    <span>doi</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"//bibbase.org/network/publication/ding-appel-javadi-zhou-lbl-sllner-schott-papon-etal-coherentopticalcontrolofaquantumdotspinqubitinawaveguidebasedspinphotoninterface-2019\"\n     class=\"bibbase bibbase_page link\">link</a>\n  &nbsp;\n  \n\n  <a href=\"#\"\n     onclick=\"showBib(event); return false;\"\n     class=\"bibbase bibtex link\">bibtex\n    <i class=\"fa fa-caret-down\"></i></a>\n\n  \n  &nbsp;\n  <a class=\"bibbase_abstract_link bibbase link\"\n     href=\"#\"\n     onclick=\"showAbstract(event); return false;\">\n    abstract <i class=\"fa fa-caret-down\"></i></a>\n  \n\n  \n  &nbsp;\n  <span class=\"bibbase_stats_paper\" style=\"color: #777;\">\n    <span>2 downloads</span>\n  </span>\n  \n\n  <!-- <a class=\"bibbase read link hidden\" -->\n  <!--    href=\"javascript:toggleRead('ding-appel-javadi-zhou-lbl-sllner-schott-papon-etal-coherentopticalcontrolofaquantumdotspinqubitinawaveguidebasedspinphotoninterface-2019')\" -->\n  <!--    title=\"Marking this paper as read adds it to your library on BibBase.\" -->\n  <!--    > -->\n  <!--   <i class=\"fa fa-check\"></i>&nbsp; -->\n  <!--   <span>mark as read</span> -->\n  <!-- </a> -->\n\n  &nbsp;\n  \n  \n\n</span>\n\n<div class=\"well well-small bibbase\" data-type=\"bibtex\"\n     style=\"display:none\">\n  <pre style=\"white-space: pre-wrap;\">@article{ding_coherent_2019,\n\ttitle = {Coherent {Optical} {Control} of a {Quantum}-{Dot} {Spin}-{Qubit} in a {Waveguide}-{Based} {Spin}-{Photon} {Interface}},\n\tvolume = {11},\n\turl = {https://link.aps.org/doi/10.1103/PhysRevApplied.11.031002},\n\tdoi = {10.1103/PhysRevApplied.11.031002},\n\tabstract = {Waveguide-based spin-photon interfaces on the GaAs platform have emerged as a promising system for a variety of quantum information applications directly integrated into planar photonic circuits. The coherent control of spin states in a quantum dot can be achieved by applying circularly polarized laser pulses that may be coupled into the planar waveguide vertically through radiation modes. However, proper control of the laser polarization is challenging since the polarization is modified through the transformation from the far field to the exact position of the quantum dot in the nanostructure. Here, we demonstrate polarization-controlled excitation of a quantum-dot electron spin and use that to perform coherent control in a Ramsey interferometry experiment. The Ramsey interference reveals an inhomogeneous dephasing time of 2.2±0.1 ns, which is comparable to the values so far only obtained in bulk media. We analyze the experimental limitations in spin initialization fidelity and Ramsey contrast and identify the underlying mechanisms.},\n\tnumber = {3},\n\turldate = {2022-08-03},\n\tjournal = {Physical Review Applied},\n\tauthor = {Ding, Dapeng and Appel, Martin Hayhurst and Javadi, Alisa and Zhou, Xiaoyan and Löbl, Matthias Christian and Söllner, Immo and Schott, Rüdiger and Papon, Camille and Pregnolato, Tommaso and Midolo, Leonardo and Wieck, Andreas Dirk and Ludwig, Arne and Warburton, Richard John and Schröder, Tim and Lodahl, Peter},\n\tmonth = mar,\n\tyear = {2019},\n\tnote = {Publisher: American Physical Society},\n\tpages = {031002},\n}\n\n</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" data-type=\"abstract\"\n     style=\"display:none\">\n  Waveguide-based spin-photon interfaces on the GaAs platform have emerged as a promising system for a variety of quantum information applications directly integrated into planar photonic circuits. The coherent control of spin states in a quantum dot can be achieved by applying circularly polarized laser pulses that may be coupled into the planar waveguide vertically through radiation modes. However, proper control of the laser polarization is challenging since the polarization is modified through the transformation from the far field to the exact position of the quantum dot in the nanostructure. Here, we demonstrate polarization-controlled excitation of a quantum-dot electron spin and use that to perform coherent control in a Ramsey interferometry experiment. The Ramsey interference reveals an inhomogeneous dephasing time of 2.2±0.1 ns, which is comparable to the values so far only obtained in bulk media. We analyze the experimental limitations in spin initialization fidelity and Ramsey contrast and identify the underlying mechanisms.\n</div>\n\n\n</div>\n\n\n\n\n\n    </div>\n  </div>\n\n  <div class=\"bibbase_group_whole\" id=\"group_2018\">\n    <div class=\"bibbase_group\"\n      onclick=\"toggleGroup('group_2018')\"\n      onkeypress=\"toggleGroup('group_2018')\"\n      tabindex=\"0\">\n      <i class=\"fa fa-angle-down bibbase_group_head_icon\"></i>&nbsp;\n      <span>2018</span>\n      <span class=\"bibbase_group_count\">\n        \n        (3)\n        \n      </span>\n    </div>\n    <div class=\"bibbase_group_body\">\n      \n  \n  <div class=\"bibbase_paper\" id=\"javadi-ding-appel-mahmoodian-lbl-sllner-schott-papon-etal-spinphotoninterfaceandspincontrolledphotonswitchinginananobeamwaveguide-2018\">\n  <span class=\"bibbase_paper_titleauthoryear\">\n\n  \n  <span class=\"bibbase_paper_title\">\n  \n  \n  \n  <a href=\"https://www.nature.com/articles/s41565-018-0091-5\"\n     onclick=\"return trackOutboundLink('publications', 'click', 'javadi-ding-appel-mahmoodian-lbl-sllner-schott-papon-etal-spinphotoninterfaceandspincontrolledphotonswitchinginananobeamwaveguide-2018', 'https://www.nature.com/articles/s41565-018-0091-5', event);\">\n    Spin–photon interface and spin-controlled photon switching in a nanobeam waveguide.\n  </a>\n  \n  \n  \n</span>\n\n  <span class=\"bibbase_paper_author\">\n  Javadi, A.; Ding, D.; Appel, M. H.; Mahmoodian, S.; Löbl, M. C.; Söllner, I.; Schott, R.; Papon, C.; Pregnolato, T.; Stobbe, S.; Midolo, L.; <a class=\"bibbase author link\" href=\"https://www.physik.hu-berlin.de/en/iqp/publications\">Schröder, T.</a>; Wieck, A. D.; Ludwig, A.; Warburton, R. J.;  and Lodahl, P.\n</span>\n\n  \n\n</span>\n\n  <i>Nature Nanotechnology</i>, 13(5): 398–403. May 2018.\n  <span class=\"note\">Number: 5 Publisher: Nature Publishing Group</span>\n\n<span class=\"bibbase_note\"></span>\n\n<br class=\"bibbase_paper_content\"/>\n\n<span class=\"bibbase_paper_content dontprint\">\n\n  \n  <a href=\"https://www.nature.com/articles/s41565-018-0091-5\"\n     onclick=\"log_download('javadi-ding-appel-mahmoodian-lbl-sllner-schott-papon-etal-spinphotoninterfaceandspincontrolledphotonswitchinginananobeamwaveguide-2018', 'https://www.nature.com/articles/s41565-018-0091-5', event.ctrlKey, event)\">\n    <img src=\"//bibbase.org/img/filetypes/link.svg\"\n\t     alt=\"Spin–photon interface and spin-controlled photon switching in a nanobeam waveguide [link]\"\n       title=\"Paper\"\n\t     class=\"bibbase_icon\"\n         ><span class=\"bibbase_icon_text\">Paper</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"http://doi.org/10.1038/s41565-018-0091-5\"\n     onclick=\"log_download('javadi-ding-appel-mahmoodian-lbl-sllner-schott-papon-etal-spinphotoninterfaceandspincontrolledphotonswitchinginananobeamwaveguide-2018', 'http://doi.org/10.1038/s41565-018-0091-5', event.ctrlKey)\"\n     class=\"bibbase doi link\">\n    <span>doi</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"//bibbase.org/network/publication/javadi-ding-appel-mahmoodian-lbl-sllner-schott-papon-etal-spinphotoninterfaceandspincontrolledphotonswitchinginananobeamwaveguide-2018\"\n     class=\"bibbase bibbase_page link\">link</a>\n  &nbsp;\n  \n\n  <a href=\"#\"\n     onclick=\"showBib(event); return false;\"\n     class=\"bibbase bibtex link\">bibtex\n    <i class=\"fa fa-caret-down\"></i></a>\n\n  \n  &nbsp;\n  <a class=\"bibbase_abstract_link bibbase link\"\n     href=\"#\"\n     onclick=\"showAbstract(event); return false;\">\n    abstract <i class=\"fa fa-caret-down\"></i></a>\n  \n\n  \n  &nbsp;\n  <span class=\"bibbase_stats_paper\" style=\"color: #777;\">\n    <span>3 downloads</span>\n  </span>\n  \n\n  <!-- <a class=\"bibbase read link hidden\" -->\n  <!--    href=\"javascript:toggleRead('javadi-ding-appel-mahmoodian-lbl-sllner-schott-papon-etal-spinphotoninterfaceandspincontrolledphotonswitchinginananobeamwaveguide-2018')\" -->\n  <!--    title=\"Marking this paper as read adds it to your library on BibBase.\" -->\n  <!--    > -->\n  <!--   <i class=\"fa fa-check\"></i>&nbsp; -->\n  <!--   <span>mark as read</span> -->\n  <!-- </a> -->\n\n  &nbsp;\n  \n  \n  \n  \n  \n  \n  \n  \n\n</span>\n\n<div class=\"well well-small bibbase\" data-type=\"bibtex\"\n     style=\"display:none\">\n  <pre style=\"white-space: pre-wrap;\">@article{javadi_spinphoton_2018,\n\ttitle = {Spin–photon interface and spin-controlled photon switching in a nanobeam waveguide},\n\tvolume = {13},\n\tcopyright = {2018 The Author(s)},\n\tissn = {1748-3395},\n\turl = {https://www.nature.com/articles/s41565-018-0091-5},\n\tdoi = {10.1038/s41565-018-0091-5},\n\tabstract = {The spin of an electron is a promising memory state and qubit. Connecting spin states that are spatially far apart will enable quantum nodes and quantum networks based on the electron spin. Towards this goal, an integrated spin–photon interface would be a major leap forward as it combines the memory capability of a single spin with the efficient transfer of information by photons. Here, we demonstrate such an efficient and optically programmable interface between the spin of an electron in a quantum dot and photons in a nanophotonic waveguide. The spin can be deterministically prepared in the ground state with a fidelity of up to 96\\%. Subsequently, the system is used to implement a single-spin photonic switch, in which the spin state of the electron directs the flow of photons through the waveguide. The spin–photon interface may enable on-chip photon–photon gates, single-photon transistors and the efficient generation of a photonic cluster state.},\n\tlanguage = {en},\n\tnumber = {5},\n\turldate = {2022-08-03},\n\tjournal = {Nature Nanotechnology},\n\tauthor = {Javadi, Alisa and Ding, Dapeng and Appel, Martin Hayhurst and Mahmoodian, Sahand and Löbl, Matthias Christian and Söllner, Immo and Schott, Rüdiger and Papon, Camille and Pregnolato, Tommaso and Stobbe, Søren and Midolo, Leonardo and Schröder, Tim and Wieck, Andreas Dirk and Ludwig, Arne and Warburton, Richard John and Lodahl, Peter},\n\tmonth = may,\n\tyear = {2018},\n\tnote = {Number: 5\nPublisher: Nature Publishing Group},\n\tkeywords = {Nanophotonics and plasmonics, Quantum optics, Single photons and quantum effects},\n\tpages = {398--403},\n}\n\n</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" data-type=\"abstract\"\n     style=\"display:none\">\n  The spin of an electron is a promising memory state and qubit. Connecting spin states that are spatially far apart will enable quantum nodes and quantum networks based on the electron spin. Towards this goal, an integrated spin–photon interface would be a major leap forward as it combines the memory capability of a single spin with the efficient transfer of information by photons. Here, we demonstrate such an efficient and optically programmable interface between the spin of an electron in a quantum dot and photons in a nanophotonic waveguide. The spin can be deterministically prepared in the ground state with a fidelity of up to 96%. Subsequently, the system is used to implement a single-spin photonic switch, in which the spin state of the electron directs the flow of photons through the waveguide. The spin–photon interface may enable on-chip photon–photon gates, single-photon transistors and the efficient generation of a photonic cluster state.\n</div>\n\n\n</div>\n\n\n  <div class=\"bibbase_paper\" id=\"wan-shields-kim-mouradian-lienhard-walsh-bakhru-schrder-etal-efficientextractionoflightfromanitrogenvacancycenterinadiamondparabolicreflector-2018\">\n  <span class=\"bibbase_paper_titleauthoryear\">\n\n  \n  <span class=\"bibbase_paper_title\">\n  \n  \n  \n  <a href=\"https://doi.org/10.1021/acs.nanolett.7b04684\"\n     onclick=\"return trackOutboundLink('publications', 'click', 'wan-shields-kim-mouradian-lienhard-walsh-bakhru-schrder-etal-efficientextractionoflightfromanitrogenvacancycenterinadiamondparabolicreflector-2018', 'https://doi.org/10.1021/acs.nanolett.7b04684', event);\">\n    Efficient Extraction of Light from a Nitrogen-Vacancy Center in a Diamond Parabolic Reflector.\n  </a>\n  \n  \n  \n</span>\n\n  <span class=\"bibbase_paper_author\">\n  Wan, N. H.; Shields, B. J.; Kim, D.; Mouradian, S.; Lienhard, B.; Walsh, M.; Bakhru, H.; <a class=\"bibbase author link\" href=\"https://www.physik.hu-berlin.de/en/iqp/publications\">Schröder, T.</a>;  and Englund, D.\n</span>\n\n  \n\n</span>\n\n  <i>Nano Letters</i>, 18(5): 2787–2793. May 2018.\n  <span class=\"note\">Publisher: American Chemical Society</span>\n\n<span class=\"bibbase_note\"></span>\n\n<br class=\"bibbase_paper_content\"/>\n\n<span class=\"bibbase_paper_content dontprint\">\n\n  \n  <a href=\"https://doi.org/10.1021/acs.nanolett.7b04684\"\n     onclick=\"log_download('wan-shields-kim-mouradian-lienhard-walsh-bakhru-schrder-etal-efficientextractionoflightfromanitrogenvacancycenterinadiamondparabolicreflector-2018', 'https://doi.org/10.1021/acs.nanolett.7b04684', event.ctrlKey, event)\">\n    <img src=\"//bibbase.org/img/filetypes/link.svg\"\n\t     alt=\"Efficient Extraction of Light from a Nitrogen-Vacancy Center in a Diamond Parabolic Reflector [link]\"\n       title=\"Paper\"\n\t     class=\"bibbase_icon\"\n         ><span class=\"bibbase_icon_text\">Paper</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"http://doi.org/10.1021/acs.nanolett.7b04684\"\n     onclick=\"log_download('wan-shields-kim-mouradian-lienhard-walsh-bakhru-schrder-etal-efficientextractionoflightfromanitrogenvacancycenterinadiamondparabolicreflector-2018', 'http://doi.org/10.1021/acs.nanolett.7b04684', event.ctrlKey)\"\n     class=\"bibbase doi link\">\n    <span>doi</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"//bibbase.org/network/publication/wan-shields-kim-mouradian-lienhard-walsh-bakhru-schrder-etal-efficientextractionoflightfromanitrogenvacancycenterinadiamondparabolicreflector-2018\"\n     class=\"bibbase bibbase_page link\">link</a>\n  &nbsp;\n  \n\n  <a href=\"#\"\n     onclick=\"showBib(event); return false;\"\n     class=\"bibbase bibtex link\">bibtex\n    <i class=\"fa fa-caret-down\"></i></a>\n\n  \n  &nbsp;\n  <a class=\"bibbase_abstract_link bibbase link\"\n     href=\"#\"\n     onclick=\"showAbstract(event); return false;\">\n    abstract <i class=\"fa fa-caret-down\"></i></a>\n  \n\n  \n  &nbsp;\n  <span class=\"bibbase_stats_paper\" style=\"color: #777;\">\n    <span>2 downloads</span>\n  </span>\n  \n\n  <!-- <a class=\"bibbase read link hidden\" -->\n  <!--    href=\"javascript:toggleRead('wan-shields-kim-mouradian-lienhard-walsh-bakhru-schrder-etal-efficientextractionoflightfromanitrogenvacancycenterinadiamondparabolicreflector-2018')\" -->\n  <!--    title=\"Marking this paper as read adds it to your library on BibBase.\" -->\n  <!--    > -->\n  <!--   <i class=\"fa fa-check\"></i>&nbsp; -->\n  <!--   <span>mark as read</span> -->\n  <!-- </a> -->\n\n  &nbsp;\n  \n  \n\n</span>\n\n<div class=\"well well-small bibbase\" data-type=\"bibtex\"\n     style=\"display:none\">\n  <pre style=\"white-space: pre-wrap;\">@article{wan_efficient_2018,\n\ttitle = {Efficient {Extraction} of {Light} from a {Nitrogen}-{Vacancy} {Center} in a {Diamond} {Parabolic} {Reflector}},\n\tvolume = {18},\n\tissn = {1530-6984},\n\turl = {https://doi.org/10.1021/acs.nanolett.7b04684},\n\tdoi = {10.1021/acs.nanolett.7b04684},\n\tabstract = {Quantum emitters in solids are being developed for a range of quantum technologies, including quantum networks, computing, and sensing. However, a remaining challenge is the poor photon collection due to the high refractive index of most host materials. Here we overcome this limitation by introducing monolithic parabolic reflectors as an efficient geometry for broadband photon extraction from quantum emitter and experimentally demonstrate this device for the nitrogen-vacancy (NV) center in diamond. Simulations indicate a photon collection efficiency exceeding 75\\% across the visible spectrum and experimental devices, fabricated using a high-throughput gray scale lithography process, demonstrating a photon extraction efficiency of (41 ± 5)\\%. This device enables a raw experimental detection efficiency of (12 ± 1)\\% with fluorescence detection rates as high as (4.114 ± 0.003) × 106 counts per second (cps) from a single NV center. Enabled by our deterministic emitter localization and fabrication process, we find a high number of exceptional devices with an average count rate of (3.1 ± 0.9) × 106 cps.},\n\tnumber = {5},\n\turldate = {2022-08-03},\n\tjournal = {Nano Letters},\n\tauthor = {Wan, Noel H. and Shields, Brendan J. and Kim, Donggyu and Mouradian, Sara and Lienhard, Benjamin and Walsh, Michael and Bakhru, Hassaram and Schröder, Tim and Englund, Dirk},\n\tmonth = may,\n\tyear = {2018},\n\tnote = {Publisher: American Chemical Society},\n\tpages = {2787--2793},\n}\n\n</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" data-type=\"abstract\"\n     style=\"display:none\">\n  Quantum emitters in solids are being developed for a range of quantum technologies, including quantum networks, computing, and sensing. However, a remaining challenge is the poor photon collection due to the high refractive index of most host materials. Here we overcome this limitation by introducing monolithic parabolic reflectors as an efficient geometry for broadband photon extraction from quantum emitter and experimentally demonstrate this device for the nitrogen-vacancy (NV) center in diamond. Simulations indicate a photon collection efficiency exceeding 75% across the visible spectrum and experimental devices, fabricated using a high-throughput gray scale lithography process, demonstrating a photon extraction efficiency of (41 ± 5)%. This device enables a raw experimental detection efficiency of (12 ± 1)% with fluorescence detection rates as high as (4.114 ± 0.003) × 106 counts per second (cps) from a single NV center. Enabled by our deterministic emitter localization and fabrication process, we find a high number of exceptional devices with an average count rate of (3.1 ± 0.9) × 106 cps.\n</div>\n\n\n</div>\n\n\n  <div class=\"bibbase_paper\" id=\"marseglia-saha-ajoy-schrder-englund-jelezko-walsworth-pacheco-etal-brightnanowiresinglephotonsourcebasedonsivcentersindiamond-2018\">\n  <span class=\"bibbase_paper_titleauthoryear\">\n\n  \n  <span class=\"bibbase_paper_title\">\n  \n  \n  \n  <a href=\"https://opg.optica.org/oe/abstract.cfm?uri=oe-26-1-80\"\n     onclick=\"return trackOutboundLink('publications', 'click', 'marseglia-saha-ajoy-schrder-englund-jelezko-walsworth-pacheco-etal-brightnanowiresinglephotonsourcebasedonsivcentersindiamond-2018', 'https://opg.optica.org/oe/abstract.cfm?uri=oe-26-1-80', event);\">\n    Bright nanowire single photon source based on SiV centers in diamond.\n  </a>\n  \n  \n  \n</span>\n\n  <span class=\"bibbase_paper_author\">\n  Marseglia, L.; Saha, K.; Ajoy, A.; <a class=\"bibbase author link\" href=\"https://www.physik.hu-berlin.de/en/iqp/publications\">Schröder, T.</a>; Englund, D.; Jelezko, F.; Walsworth, R.; Pacheco, J. L.; Perry, D. L.; Bielejec, E. S.;  and Cappellaro, P.\n</span>\n\n  \n\n</span>\n\n  <i>Optics Express</i>, 26(1): 80–89. January 2018.\n  <span class=\"note\">Publisher: Optica Publishing Group</span>\n\n<span class=\"bibbase_note\"></span>\n\n<br class=\"bibbase_paper_content\"/>\n\n<span class=\"bibbase_paper_content dontprint\">\n\n  \n  <a href=\"https://opg.optica.org/oe/abstract.cfm?uri=oe-26-1-80\"\n     onclick=\"log_download('marseglia-saha-ajoy-schrder-englund-jelezko-walsworth-pacheco-etal-brightnanowiresinglephotonsourcebasedonsivcentersindiamond-2018', 'https://opg.optica.org/oe/abstract.cfm?uri=oe-26-1-80', event.ctrlKey, event)\">\n    <img src=\"//bibbase.org/img/filetypes/link.svg\"\n\t     alt=\"Bright nanowire single photon source based on SiV centers in diamond [link]\"\n       title=\"Paper\"\n\t     class=\"bibbase_icon\"\n         ><span class=\"bibbase_icon_text\">Paper</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"http://doi.org/10.1364/OE.26.000080\"\n     onclick=\"log_download('marseglia-saha-ajoy-schrder-englund-jelezko-walsworth-pacheco-etal-brightnanowiresinglephotonsourcebasedonsivcentersindiamond-2018', 'http://doi.org/10.1364/OE.26.000080', event.ctrlKey)\"\n     class=\"bibbase doi link\">\n    <span>doi</span></a>\n  &nbsp;\n  \n\n  \n  <a href=\"//bibbase.org/network/publication/marseglia-saha-ajoy-schrder-englund-jelezko-walsworth-pacheco-etal-brightnanowiresinglephotonsourcebasedonsivcentersindiamond-2018\"\n     class=\"bibbase bibbase_page link\">link</a>\n  &nbsp;\n  \n\n  <a href=\"#\"\n     onclick=\"showBib(event); return false;\"\n     class=\"bibbase bibtex link\">bibtex\n    <i class=\"fa fa-caret-down\"></i></a>\n\n  \n  &nbsp;\n  <a class=\"bibbase_abstract_link bibbase link\"\n     href=\"#\"\n     onclick=\"showAbstract(event); return false;\">\n    abstract <i class=\"fa fa-caret-down\"></i></a>\n  \n\n  \n  &nbsp;\n  <span class=\"bibbase_stats_paper\" style=\"color: #777;\">\n    <span>5 downloads</span>\n  </span>\n  \n\n  <!-- <a class=\"bibbase read link hidden\" -->\n  <!--    href=\"javascript:toggleRead('marseglia-saha-ajoy-schrder-englund-jelezko-walsworth-pacheco-etal-brightnanowiresinglephotonsourcebasedonsivcentersindiamond-2018')\" -->\n  <!--    title=\"Marking this paper as read adds it to your library on BibBase.\" -->\n  <!--    > -->\n  <!--   <i class=\"fa fa-check\"></i>&nbsp; -->\n  <!--   <span>mark as read</span> -->\n  <!-- </a> -->\n\n  &nbsp;\n  \n  \n\n</span>\n\n<div class=\"well well-small bibbase\" data-type=\"bibtex\"\n     style=\"display:none\">\n  <pre style=\"white-space: pre-wrap;\">@article{marseglia_bright_2018,\n\ttitle = {Bright nanowire single photon source based on {SiV} centers in diamond},\n\tvolume = {26},\n\tcopyright = {\\&amp;\\#169; 2018 Optical Society of America},\n\tissn = {1094-4087},\n\turl = {https://opg.optica.org/oe/abstract.cfm?uri=oe-26-1-80},\n\tdoi = {10.1364/OE.26.000080},\n\tabstract = {The practical implementation of many quantum technologies relies on the development of robust and bright single photon sources that operate at room temperature. The negatively charged silicon-vacancy (SiV\\&amp;\\#x02212;) color center in diamond is a possible candidate for such a single photon source. However, due to the high refraction index mismatch to air, color centers in diamond typically exhibit low photon out-coupling. An additional shortcoming is due to the random localization of native defects in the diamond sample. Here we demonstrate deterministic implantation of Si ions with high conversion efficiency to single SiV\\&amp;\\#x02212; centers, targeted to fabricated nanowires. The co-localization of single SiV\\&amp;\\#x02212; centers with the nanostructures yields a ten times higher light coupling efficiency than for single SiV\\&amp;\\#x02212; centers in bulk diamond. This enhanced photon out-coupling, together with the intrinsic scalability of the SiV\\&amp;\\#x02212; creation method, enables a new class of devices for integrated photonics and quantum science.},\n\tlanguage = {EN},\n\tnumber = {1},\n\turldate = {2022-08-03},\n\tjournal = {Optics Express},\n\tauthor = {Marseglia, L. and Saha, K. and Ajoy, A. and Schröder, T. and Englund, D. and Jelezko, F. and Walsworth, R. and Pacheco, J. L. and Perry, D. L. and Bielejec, E. S. and Cappellaro, P.},\n\tmonth = jan,\n\tyear = {2018},\n\tnote = {Publisher: Optica Publishing Group},\n\tpages = {80--89},\n}\n\n</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" data-type=\"abstract\"\n     style=\"display:none\">\n  The practical implementation of many quantum technologies relies on the development of robust and bright single photon sources that operate at room temperature. The negatively charged silicon-vacancy (SiV&#x02212;) color center in diamond is a possible candidate for such a single photon source. However, due to the high refraction index mismatch to air, color centers in diamond typically exhibit low photon out-coupling. An additional shortcoming is due to the random localization of native defects in the diamond sample. Here we demonstrate deterministic implantation of Si ions with high conversion efficiency to single SiV&#x02212; centers, targeted to fabricated nanowires. The co-localization of single SiV&#x02212; centers with the nanostructures yields a ten times higher light coupling efficiency than for single SiV&#x02212; centers in bulk diamond. This enhanced photon out-coupling, together with the intrinsic scalability of the SiV&#x02212; creation method, enables a new class of devices for integrated photonics and quantum science.\n</div>\n\n\n</div>\n\n\n\n\n\n    </div>\n  </div>\n\n\n\n\n  </div>\n\n\n  <!-- Modal -->\n\n  <!-- <iframe id=\"bibbase_network_frame\" -->\n  <!--         src=\"//bibbase.org/network/control\" -->\n  <!--         style=\"display: none;\"> -->\n  <!-- </iframe> -->\n\n</div>\n"}; document.write(bibbase_data.data);