初始位相对超短脉冲强激光场高次谐波辐射的影响  

PHASE DEPENDENCE OF HIGH ORDER HARMONIC SPECTRA WITH ULTRASHORT LASER PULSES

作　　者：王迎松[1] 徐至展[1] 

机构地区：[1]中国科学院上海光学精密机械研究所强光光学开放研究实验室

出　　处：《物理学报》1999年第6期1023-1029,共7页Acta Physica Sinica

基　　金：中国科学院"九五"基础性研究重大项目

摘　　要：通过求解含时Ｓｃｈｒｄｉｎｇｅｒ方程，用加窗Ｆｏｕｒｉｅｒ分析的方法，从理论上分析了入射激光场的初始位相对超短强激光场高位谐波辐射的影响．发现相对于较长的入射激光脉冲其激光场初始位相对超短脉冲高次谐波辐射的影响非常显著。Abstract High order harmonic spectra are obtained by numerically solving the one dimension time dependent Schrdinger equation with single active electron approximation.The influence of the initial phase of the excitation field on the single atom high harmonic generation is analysized through Gabor analysis of the acceleration of the atomic dipole.The influence of the initial phase on the process of the high harmonic generation stronger for the shorter duration pulses than for the longer case.A pulse train or a single pulse of subfemtosecond level could be obtained by high harmonic generation through the adjustment of the phase of the excitation laser field.

关 键 词：激光场 超短脉冲 高次谐波辐射 初始位相 

分 类 号：TN241[电子电信—物理电子学] O437[机械工程—光学工程]