摘要
With the method of wavelet transform,we consider the temporal behaviour of high-order harmonic generation from one-dimensional H+2 exposed to an ultrashort laser pulse with a duration of tens of femtoseconds.The results,which are calculated by numerically solving the corresponding time-dependent Schrödinger equation with the split-operator method in the non-Born-Oppenheimer approach,show that:(1)The high-order harmonics in the cut-off range emitted as a train of pulses have better coherence than those in the plateau.(2)The harmonics are emitted early in time when the intensity of laser pulse increases.
作者
QU Wei-Xing
XIA Yu-Xing
GAN Ming-Long
LI Ru-Xin
XU Zhi-Zhan
屈卫星;夏宇兴;甘明龙;李儒新;徐至展(Laboratory for High Intensity Optics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800;Applied Physics Department,Shanghai Jiao Tong University,Shanghai 200030;Department of Computer Science and Technology,Shanghai Jiao Tong University,Shanghai 200030)
基金
Supported by the National Natural Science Foundation of China under Grant Nos.19974058 and 69925513
the Chinese National Major Basic Research Project under Grant No.G1999075200.
