三态NaI分子飞秒含时光电子能谱的理论研究  

Theoretical Investigation of Femtosecond-Resolved Photoelectron Spectra of the Three-Level Ladder NaI Molecule

作　　者：白静[1] 冯小静[1] 郭玮[1] 

机构地区：[1]南华大学电气工程学院,湖南衡阳421001

出　　处：《南华大学学报（自然科学版）》2015年第4期56-62,68,共8页Journal of University of South China：Science and Technology

基　　金：国家自然科学基金资助项目(11447020);湖南省自然科学基金资助项目(2015JJ3104)

摘　　要：利用三态模型和含时量子波包法,研究了NaI分子在飞秒泵浦—探测激光场中延时,波长,场强对光电子能谱的影响.波包在势能面上传播,受到非绝热效应的影响,传播到交叉区域时发生分裂,延时影响光电子能谱谱峰的位置和峰高.延时增加,非绝热效应对波包运动的影响越明显.泵浦波长影响光电子能谱构型,探测波长只影响谱峰位置,不影响峰高.激光场强增强,光电子谱谱峰增高.光电子能谱反映波包动力学信息.本文研究结果可以为实验上实现分子的光控制以及量子调控过程提供一定的参考,并为进一步研究NaI分子的动力学性质提供有用的信息.The effect of delay time, laser wavelength and intensity on the photoelectron spectra and the wave packet propagation of NaI molecule in the intense femtosecond pump- probe laser were are investigated theoretically via employing time-dependent wave packet approach. The nonadiabatic effect makes the wave packet to split into two parts, and its in- fluence become obvious with increasing delay time. Pump wavelength affects the spectra profiles. Probe wavelength affects only peak position. The intensity affects only the peak height. The results may be useful for realizing the optical control of molecule and the process of quantum manipulation of molecule experimentally, and provide some important basis for further theoretical research in this respect.

关 键 词：三态模型 非绝热效应 含时波包法 光电子能谱 

分 类 号：O644[理学—物理化学]