K_2分子Autler-Townes分裂的理论研究  

Theoretical Investigation on Autler-Townes Splitting of K_2 Molecule

作　　者：冯小静[1] 白静[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）》2016年第1期33-38,共6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波包法,研究了三态阶跃型K2分子在泵浦—探测激光场中场强、波长对光电子能谱Autler-Townes(AT)分裂的影响.首次量化了AT分裂的峰移和间距.共振时光电子能谱为对称双峰,失谐时为不对称双峰.AT分裂间距随泵浦场强增强而增大,但不随探测场强改变而改变.AT分裂间距因泵浦波长不同而不等,但不因探测波长不同而改变.随着泵浦波长偏离共振,光电子能谱逐渐由双峰变为单峰.The effects of laser intensities and laser wavelengths on Autler-Townes （AT） splitting of photoelectron spectra of three- level ladder K2 molecule driven by a pump- probe pulse was investigated via employing the time-dependent wave packet approach. Their effects on peak shift and AT separation was quantified by using an analytical fitting function.The AT separation increases with pump intensities, but does not vary with probe intensities.The AT separation changes with pump wavelengths, but does not change with probe wavelengths.The double peaks are transformed into one peak progressively as the pump is detuned from the resonance.

关 键 词：Autler-Townes分裂 含时波包法 三态阶跃型K2分子 

分 类 号：O644[理学—物理化学]