Accurate prediction of interference minima in linear molecular harmonic spectra by a modified two-center model  

作　　者：崔鑫 张頔玉 陈高 陈基根 曾思良 郭福明 杨玉军 

机构地区：[1]Institute of Atomic and Molecular Physics,Jilin University,Changchun 130012,China [2]Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy,Jilin University,Changchun 130012,China [3]School of Science,Changchun University of Science and Technology,Changchun 130022,China [4]Department of Physics and Materials Engineering,Taizhou University,Taizhou 318000,China [5]Institute of Applied Physics and Computational Mathematics,Beijing 100088,China

出　　处：《Chinese Physics B》2016年第3期163-168,共6页中国物理B（英文版）

基　　金：Project supported by the National Basic Research Program of China(Grant No.2013CB922200);the National Natural Science Foundation of China(Grant Nos.11274001,11274141,11304116,11247024,and 11034003);the Jilin Provincial Research Foundation for Basic Research,China(Grant Nos.20130101012JC and 20140101168JC)

摘　　要：We demonstrate that the interference minima in the linear molecular harmonic spectra can be accurately predicted by a modified two-center model. Based on systematically investigating the interference minima in the linear molecular harmonic spectra by the strong-field approximation （SFA）, it is found that the locations of the harmonic minima are related not only to the nuclear distance between the two main atoms contributing to the harmonic generation, but also to the symmetry of the molecular orbital. Therefore, we modify the initial phase difference between the double wave sources in the two-center model, and predict the harmonic minimum positions consistent with those simulated by SFA.We demonstrate that the interference minima in the linear molecular harmonic spectra can be accurately predicted by a modified two-center model. Based on systematically investigating the interference minima in the linear molecular harmonic spectra by the strong-field approximation （SFA）, it is found that the locations of the harmonic minima are related not only to the nuclear distance between the two main atoms contributing to the harmonic generation, but also to the symmetry of the molecular orbital. Therefore, we modify the initial phase difference between the double wave sources in the two-center model, and predict the harmonic minimum positions consistent with those simulated by SFA.

关 键 词：high-order harmonic generation molecular harmonics 

分 类 号：O561[理学—原子与分子物理]