不同偏振的啁啾激光场中的原子动态干涉  

Atomic Dynamic Interference in Chirped Laser Fields with Different Polarizations

作　　者：王顺 Shahab Ullah Khan 田晓庆 孙慧斌[1] Wang Shun;Shahab Ullah Khan;Tian Xiaoqing;Sun Huibin(College of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen,Guangdong 518060,China)

机构地区：[1]深圳大学物理与光电工程学院,广东深圳518060

出　　处：《激光与光电子学进展》2022年第1期82-89,共8页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(11575118);国家重点研发计划(2017YFF0106500);广东省自然科学基金(2018A0303130311,2021A1515010082);深圳市基础研究项目(KQJSCX20180328093801773,JCYJ20180305124540632,JCYJ20190808121405740)。

摘　　要：通过精确求解全维含时Schrodinger方程(TDSE),数值研究了在不同偏振的啁啾激光脉冲作用下的氢原子电离过程中的动态干涉效应。着重研究了啁啾参数对光电子能谱上的动态干涉图样的影响。计算结果表明:在3种偏振情形下,啁啾的增加都会引起动态干涉图样的抑制;对任何啁啾参数,干涉次峰都会随着脉冲椭偏率的增加有一个向右的移动;对任何啁啾参数,当激光脉冲长达30 fs时,动态干涉图样都会消失,表明之前报道的一维TDSE的计算并不能准确描述真实的物理过程。By accurately solving the full-dimensional time-dependent Schrodinger equation(TDSE),the dynamic interference effects in the ionization of atomic hydrogen by chirped laser pulses with different polarizations are numerically studied.The emphasis is put on the influences of the chirp parameters on the dynamic interference patterns of the photoelectron energy spectra.Numerical results show that the increase of the chirp will cause the suppression of dynamic interference pattern in three polarization cases;for any chirp parameter,the interference subpeaks show a rightward shift when the ellipticity of the pulse increases;for any chirp parameter,the dynamic interference pattern will disappear when the laser pulse is up to 30 fs,indicating that the previously reported calculation of one-dimensional TDSE cannot accurately describe the real physical process.

关 键 词：原子与分子物理学 强场光电离 动态干涉 啁啾效应 偏振 

分 类 号：O436[机械工程—光学工程]