@ARTICLE{Fieramosca2019,
author={Fieramosca, A. and Polimeno, L. and Ardizzone, V. and De Marco, L. and Pugliese, M. and Maiorano, V. and De Giorgi, M. and Dominici, L. and Gigli, G. and Gerace, D. and Ballarini, D. and Sanvitto, D.},
title={Two-dimensional hybrid perovskites sustaining strong polariton interactions at room temperature},
journal={Science Advances},
year={2019},
volume={5},
number={5},
doi={10.1126/sciadv.aav9967},
art_number={eaav9967},
note={cited By 24},
url={https://www.scopus.com/inward/record.uri?eid=2-s2.0-85066425235&doi=10.1126%2fsciadv.aav9967&partnerID=40&md5=bcbd6526995209530d61e0a4f36b1fda},
abstract={Polaritonic devices exploit the coherent coupling between excitonic and photonic degrees of freedom to perform highly nonlinear operations with low input powers. Most of the current results exploit excitons in epitaxially grown quantum wells and require low-temperature operation, while viable alternatives have yet to be found at room temperature. We show that large single-crystal flakes of two-dimensional layered perovskite are able to sustain strong polariton nonlinearities at room temperature without the need to be embedded in an optical cavity formed by highly reflecting mirrors. In particular, exciton-exciton interaction energies are shown to be spin dependent, remarkably similar to the ones known for inorganic quantum wells at cryogenic temperatures, and more than one order of magnitude larger than alternative room temperature polariton devices reported so far. Because of their easy fabrication, large dipolar oscillator strengths, and strong nonlinearities, these materials pave the way for realization of polariton devices at room temperature. Copyright © 2019 The Authors.},
publisher={American Association for the Advancement of Science},
issn={23752548},
pubmed_id={31172027},
document_type={Article},
source={Scopus},
}

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Most of the current results exploit excitons in epitaxially grown quantum wells and require low-temperature operation, while viable alternatives have yet to be found at room temperature. We show that large single-crystal flakes of two-dimensional layered perovskite are able to sustain strong polariton nonlinearities at room temperature without the need to be embedded in an optical cavity formed by highly reflecting mirrors. In particular, exciton-exciton interaction energies are shown to be spin dependent, remarkably similar to the ones known for inorganic quantum wells at cryogenic temperatures, and more than one order of magnitude larger than alternative room temperature polariton devices reported so far. Because of their easy fabrication, large dipolar oscillator strengths, and strong nonlinearities, these materials pave the way for realization of polariton devices at room temperature. 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