Interference Dynamics of Hydrogen Atoms in High-Frequency Dichromatic Laser Fields
CHENG Tai-Wang1, LI Xiao-Feng1, FU Pan-Ming1, CHEN Shi-Gang2
1Laboratory of Optical Physics, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Science, Beijing 100080
2Center for Nonlinear Studies, Institute of Applied Physics and Computational Mathematics, P.O. Box 8009-28, Beijing 100088
Interference Dynamics of Hydrogen Atoms in High-Frequency Dichromatic Laser Fields
1Laboratory of Optical Physics, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Science, Beijing 100080
2Center for Nonlinear Studies, Institute of Applied Physics and Computational Mathematics, P.O. Box 8009-28, Beijing 100088
Abstract： We investigate the ionization and high-order harmonic generation of a hydrogen atom in high-frequency (several atomic unit) super strong (up to several tens of atomic unit dichromatic laser fields. An effective iterative method in the high frequency Floquet theory framework is used in the calculations. We have considered two kinds of dichromatic laser fields, i.e., 1ω - 2ω and 1ω - 3ω. We find that, in both the cases, the ionization and high-order harmonic generation show evident dependence on the relative phase and strength of the additional harmonic field. The dynamical origin of these interference effects is also discussed.
2002, Vol. 19 
