Abstract
In this paper, we present a practical numerical technique for calculating both the ionization rate and the wave function of an atom in high-frequency laser fields. This method permits the replacement of the exact final-state wave function by its asymptotic form in the matrix elements, which is shown to extremely simplify the numerical calculations. This approach is compared with the high-frequency Floquet theory and an exact numercical Floquet calculation, and proved to be very efficient and reliable. Moreover, this method is successfully applied to investigate the two-color interference effect in the stabilization regime. We find a significant enhancement or suppression on the ionization rate and the high-order harmonic generation through adjusting the relative phase between the two frequency components.
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