非绝热耦合分子的光电子能谱及态布居的延时依赖研究

J4 ›› 2016, Vol. 33 ›› Issue (6): 647-652.

非绝热耦合分子的光电子能谱及态布居的延时依赖研究

郭玮,白静

1 南华大学电气工程学院，湖南衡阳 421001； 2中国科学院大连化学物理研究所分子反应动力学国家重点实验室，辽宁大连 421001

收稿日期:2015-11-05 修回日期:2015-12-28 出版日期:2016-11-28 发布日期:2016-11-28
通讯作者: 郭玮(1981-)，女，博士，副教授，主要从事强激光与物质相互作用研究． E-mail:vella99@163.com

Time Delay dependence of photoelectron spectroscopy and state populations of nonadiabatic coupling molecules

GUO Wei, BAI Jing

1 School of Electrical Engineering, University of South China, Hengyang, Hunan 421001, China; 2 State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Dalian, Liaoning 116023, China

Received:2015-11-05 Revised:2015-12-28 Published:2016-11-28 Online:2016-11-28

摘要/Abstract

摘要： 利用三态模型和含时波包法，研究了非绝热耦合NaI分子在强飞秒泵浦-探测激光场中延时对光电子能谱的影响，并首次研究了延时对各态布居的影响．研究表明波包在势能面上做周期性运动，运动周期大约为1000 fs. 延时为200 fs时，波包第一次到达交叉区域分裂成两部分，800 fs时波包再次返回交叉区域发生分裂．波包的周期性运动导致了光电子能谱谱峰位置的周期性变化．波包在交叉区域的分裂情况影响各态布居分布．研究表明调节泵浦-探测延时可实现对波包运动的控制及态布居的选择性分布．研究结果可以为在实验上实现分子的光控制以及量子操控过程提供一定的参考．

关键词: 量子光学；态布居；含时波包法；光电子能谱；波包运动

Abstract: The effect of the delay time on the photoelectron spectra and state populations of nonadiabatic coupling NaI molecules was investigated by pump-probe pulses via time-dependent wave packet approach. Wave packet moves periodically with roundtrip time 1000 fs. The wave packet splits into two parts in the crossing region firstly and secondly at delay time 200 fs and 800 fs, respectively. The periodical motion of the wave packet results in the periodical variation of photoelectron spectra. The wave packet splitting affects state populations. It is found that the wave packet motion and selective distribution of state populations can be achieved by adjusting pump-probe delay time. The results can provide some important basis for realizing the optical control of molecules experimentally.

Key words: quantum optics; state populations; time-dependent wave packet approach; photoelectron spectra; wave packet motion

中图分类号:

O437

郭玮白静. 非绝热耦合分子的光电子能谱及态布居的延时依赖研究[J]. J4, 2016, 33(6): 647-652.

GUO Wei, BAI Jing . Time Delay dependence of photoelectron spectroscopy and state populations of nonadiabatic coupling molecules[J]. J4, 2016, 33(6): 647-652.

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