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- Title
Multiphoton ionization of atoms by a two-color laser pulse.
- Authors
Kotelnikov, I.; Borodin, A.; Shkurinov, A.
- Abstract
The probability of multiphoton ionization of atoms in a laser radiation field containing an additional second harmonic is calculated by the imaginary time method [9, 10]. The conditions are found when the second-harmonic contribution to the ionization of atoms dominates over that of the first harmonic. It is shown that the average momentum of photoelectrons ejected from atoms depends on the phase shift between the first and second harmonics and their mutual polarization. The obtained asymptotic expressions can be used for the qualitative explanation of experiments on generation of terahertz radiation from the optical breakdown region in gas in the focus of a femtosecond laser.
- Subjects
MULTIPHOTON ionization; ULTRASHORT laser pulses; ATOMS; HARMONIC analysis (Mathematics); PHOTOELECTRONS; FEMTOSECOND lasers; MOMENTUM (Mechanics)
- Publication
Journal of Experimental & Theoretical Physics, 2011, Vol 112, Issue 6, p946
- ISSN
1063-7761
- Publication type
Article
- DOI
10.1134/S1063776111050049