摘要
The dynamic process of H2+ in intense ultrashort laser pulses with intensities of 1014 ~ 1015 W/cm2, wavelength of 532nm and duration of 22fs is theoretically investigated by using collinear model and numerically solving the time-dependent Schrodinger equation. The results show that: (1) the dissociation and dissociative ionization compete each other in the case of intensities between 2.5 × 1014 and 4.0 × 1014 W/cm2;(2) both the dissociation and the dissociative ionization are much smaller and appear at about 5 cycles (≈9fs) later than the ionization. In addition, we estimate the spectrum of high harmonic generation and find that the well-known cutoff rule is invalid for the ultrashort laser pulse (e.g. the duration ~ 25fs), because the shorter pulse can produce higher order harmonics than the longer one.
作者
屈卫星
陈朝阳
张文琦
徐至展
Qu Wei-xing;CHEN Zhao-yang;ZHANG Wen-qi;XU Zhi-Zhan(Laboratory for High Intensity Optics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800)
基金
Supported by China Postdoctoral Science Foundation,。