The Dynamics of 1D H 2 + Interacting with Ultrashort Laser Pulse

Abstract

Using a collinear model, we theoretically investigat the dynamic process and the spectrum of high harmonic generation of hydrogen molecular ion (H 2 + ) in intense ultrashort laser pulses with intensities of 1014 ~ 1015 W/cm 2, the wavelength of 532nm and the duration of 22fs. The results show that: (1) The ionization mainly occurs in the decay-front of the pulse profile when the pulse’s peak intensity is low and in the plateau-front when the intensity is high. (2) The dissociation and the dissociative ionization are very smaller and appear later about 5 cycles (≈ 9fs) than the ionization. (3) The spectrum of high harmonic generation demonstrates that the shorter pulse can produce higher order harmonics than the longer one.