We theoretically study the photoelectron momentum spectra of the negative hydrogen ions by few-cycle orthogonally polarized two-color (OTC) laser pulses. It is found that the photoelectron momentum spectra can be effectively manipulated in the polarized plane by few-cycle OTC laser pulses. The results qualitatively agree well with the prediction of the simple man’s model. Finally, the effects of the duration of laser pulse on the photoelectron momentum spectra are discussed. The present work is meaningful for the optical control of the laser induced photodetachment of negative ions.
We theoretically investigate the detachment of silver anions by a few-cycle linearly polarized laser pulse. The results show that the angular distributions of photoelectron obtained by the strong-field approximation model are in good agreement with the recent experimental result. The photoelectron angular distributions are not dependent of the volume effect of a focused laser beam. More interestingly, based on the saddle-point method, the interference patterns in the photodetachment from silver anions are clearly clarified in detail.
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