Abstract
ABSTRACT For the molecular ion in few-cycle laser pulses, numerical simulation of the one-dimensional (1D) non-Born-Oppenheimer approximation time-dependent Schrödinger equation was performed to study the effect of laser parameters on molecular high-order harmonic generation (HHG). The minimum in the high-order harmonic spectrum, as a consequence of the destructive interference, appears in the case of a long wavelength. By manipulating the parameters of the laser fields in HHG, we demonstrate that the interference minimum in the high-order region is significantly dependent on the laser parameter; however, in the low-order region it is insensitive to the laser parameter. Additionally, the time-frequency analysis is used to identify the mechanism of electron recombination times in HHG.
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