Phase Measurement of Resonant Two-Photon Ionization in Helium
Atomic Physics
2010-05-19 v1 Optics
Abstract
We study resonant two-color two-photon ionization of Helium via the 1s3p 1P1 state. The first color is the 15th harmonic of a tunable titanium sapphire laser, while the second color is the fundamental laser radiation. Our method uses phase-locked high-order harmonics to determine the {\it 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.
Keywords
Cite
@article{arxiv.1002.2550,
title = {Phase Measurement of Resonant Two-Photon Ionization in Helium},
author = {M. Swoboda and T. Fordell and K. Klünder and J. M. Dahlström and M. Miranda and C. Buth and K. J. Schafer and J. Mauritsson and A. L'Huillier and M. Gisselbrecht},
journal= {arXiv preprint arXiv:1002.2550},
year = {2010}
}
Comments
4 pages, 5 figures, under consideration