飞秒激光场中OCS分子的里德堡态激发  

Rydberg state excitation of OCS molecules in the femtosecond laser fields

作　　者：吕航[1] 张世文 王瑞 孙添 刘洋 徐海峰[1] LV Hang;ZHANG Shi-Wen;WANG Rui;SUN Tian;LIU Yang;XU Hai-Feng(Institute of Atomic and Molecular Physics,Jilin University,Changchun 130012,China)

机构地区：[1]吉林大学原子与分子物理研究所,长春130012

出　　处：《原子与分子物理学报》2020年第6期916-921,共6页Journal of Atomic and Molecular Physics

基　　金：国家自然科学基金(11704149,11874179);吉林省自然科学基金(20190103045JH,20180101289JC)。

摘　　要：本文研究了800 nm飞秒强激光场下OCS分子的里德堡态激发过程.实验不仅观测到强激光场中的中性母体分子的里德堡态激发,而且观测到大量的中性里德堡态碎片.我们测量了里德堡态激发产率随激光强度及椭偏率的变化,并与强场电离解离进行了比较.分析表明,飞秒激光场下中性里德堡态碎片的产生与强场多次电离密切相关.此外,我们还讨论了中性里德堡态碎片对激光椭偏率依赖的内在原因.In this paper,the Rydberg state excitation of OCS molecules in femtosecond laser field is studied.We have observed both parent and fragments survived in strong laser fields in high Rydberg states.We have measured the dependence of the yields of the Rydberg state excitation on the laser intensity and ellipticity,and compared the results with those of strong field ionization and dissociation.Analysis indicates that the formation of neutral fragments is closely related to multiple ionization of molecules in the femtosecond strong laser fields.Furthermore,we also discuss the mechanism of the strong dependence of the neutral Rydberg state fragments on the laser ellipticity.

关 键 词：里德堡态激发 强激光场 OCS分子 碎片化 

分 类 号：O56[理学—原子与分子物理]