Phase measurement of resonant two-photon ionization in helium. Swoboda, M, Fordell, T, Klünder, K, Dahlström, J M, Miranda, M, Buth, C, Schafer, K J, Mauritsson, J, L'Huillier, A, & Gisselbrecht, M Physical review letters, 104(MARCH):103003, 2010. arXiv: 1002.2550doi abstract bibtex We study resonant two-color two-photon ionization of helium via the 1s3p (1)P(1) state. The first color is the 15th harmonic of a tunable Ti:sapphire laser, while the second color is the fundamental laser radiation. Our method uses phase-locked high-order harmonics to determine the phase of the two-photon process by interferometry. The measurement of the two-photon ionization phase variation as a function of detuning from the resonance and intensity of the dressing field allows us to determine the intensity dependence of the transition energy.
@article{Swoboda2010,
title = {Phase measurement of resonant two-photon ionization in helium.},
volume = {104},
issn = {0031-9007},
doi = {10.1103/PhysRevLett.104.103003},
abstract = {We study resonant two-color two-photon ionization of helium via the 1s3p (1)P(1) state. The first color is the 15th harmonic of a tunable Ti:sapphire laser, while the second color is the fundamental laser radiation. Our method uses phase-locked high-order harmonics to determine the phase of the two-photon process by interferometry. The measurement of the two-photon ionization phase variation as a function of detuning from the resonance and intensity of the dressing field allows us to determine the intensity dependence of the transition energy.},
number = {MARCH},
journal = {Physical review letters},
author = {Swoboda, M and Fordell, T and Klünder, K and Dahlström, J M and Miranda, M and Buth, C and Schafer, K J and Mauritsson, J and L'Huillier, A and Gisselbrecht, M},
year = {2010},
pmid = {20366419},
note = {arXiv: 1002.2550},
keywords = {\#nosource},
pages = {103003},
}