Phase Measurement of Resonant Two-Photon Ionization in Helium
Autor: | Swoboda, M., Fordell, T., Klünder, K., Dahlström, J. M., Miranda, M., Buth, C., Schafer, K. J., Mauritsson, J., L'Huillier, A., Gisselbrecht, M. |
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Rok vydání: | 2010 |
Předmět: | |
Zdroj: | Physical Review Letters 2010 |
Druh dokumentu: | Working Paper |
DOI: | 10.1103/PhysRevLett.104.103003 |
Popis: | 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. Comment: 4 pages, 5 figures, under consideration |
Databáze: | arXiv |
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