Influence of intensity and pulse width on ionization of linear multi-atom molecular ion in two-color laser fields
The studies of the wavelet structures of the molecular excitations with the high intense laser are very active in the strong laser field physics. The one-dimensional time-dependent Schrdinger equation was numerically solved with the symmetric splitting of the short-time exponential propagator and the fast Fourier transformation, and influence of intensity and pulse with on ionization of linear multi-ation molecular ion in two-color laser fields was researched. The theory results show that the dependence of ionization probability on the atomic distance can be altered obviously with the fundamental wave-field-intensity of 1.2×10~13 ~1.2×10~15 W/cm2, but unchanged with respect to different intensity ratios. In addition, the continuous interaction of laser pulse can enhance molecular ionization, the ionization, however, comes up to saturates when the interaction time reaches 75 fs with given parameters. These results can be explained by the static-electric-field ionization model.