Interference Dynamics of Hydrogen Atoms in High-Frequency Dichromatic Laser Fields

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.