超短脉冲谐波辐射过程中的量子路径分析  

Analysis of quantum paths in high-order harmonic generation of ultra-short laser pulse

作　　者：刘烨[1] 陈光龙[1] 邵辉丽[1] 

机构地区：[1]上海工程技术大学基础教学学院,上海201620

出　　处：《原子与分子物理学报》2011年第4期697-702,共6页Journal of Atomic and Molecular Physics

基　　金：上海高校选拔培养优秀青年教师科研专项基金(gjd08028)

摘　　要：本文数值计算了脉宽为半个光学周期的超短脉冲在不同载波包络相位下的谐波波谱,通过比较谐波波谱截止频率与电子通过主要路径可获得的最大动能的差异,研究了超短脉冲谐波辐射过程中的量子路径.结果显示,超短脉冲谐波辐射过程中电子获得动能的量子路径偏离主要量子路径,而且该偏离效应受载波包络相位的影响.We calculate the high-order harmonic generation spectrum for ultra-short laser pulse whose duration is 0.5T （T is the optical cycle） with different carrier-envelope phases. The analysis of quantum paths has been given by comparing the cutoff frequency with the maximum kinetic energy gained by the electron through the dominant quantum path. The results show that the quantum path through which the electron gains kinetic energy deviates the dominant quantum path. In addition, the deviation is effected of the carrier-envelope phase.

关 键 词：超短脉冲 高次谐波产生 量子路径 载波包络相位 

分 类 号：O562[理学—原子与分子物理]