少周期强激光脉冲下氩原子的再碰撞激发电离  

Few-cycle Laser Intensity on Recollision Excitation with Subsequent Ionization of Argon Atoms

作　　者：白宇星 郝小雷[1] 李卫东 BAI Yuxing;HAO Xiaolei;LI Weidong(Institute of Theoretical Physics,Shanxi University,Taiyuan 030006,China;College of Engineering Physics,Shenzhen Technology University,Shenzhen 518118,China.)

机构地区：[1]山西大学理论物理研究所,山西太原030006 [2]深圳技术大学工程物理学院,广东深圳518118

出　　处：《山西大学学报（自然科学版）》2023年第2期362-366,共5页Journal of Shanxi University(Natural Science Edition)

基　　金：国家自然科学基金(11874246)。

摘　　要：文章利用库仑修正的量子轨迹方法(Coulomb-corrected quantum-trajectories,CCQT)研究了氩(Ar)原子在少周期激光脉冲中的再碰撞激发电离(recollision excitation with subsequent ionization,RESI)过程。研究发现,随着光强的增大,Ar原子的动量关联分布逐渐由第二四象限向第一三象限转变,与实验结果吻合。分析表明,电子关联的转变主要是由于第一个电子返回时所携带的能量随光强变化造成的。Using the Coulomb-corrected quantum-trajectories method(CCQT),we investigated the recollision excitation with subsequent ionization(RESI)process of argon(Ar)atoms in few-cycle intense laser field.It is found that the momentum correlation distribution of Ar atoms gradually changes from the second and fourth quadrants to the first and third quadrant with the increase of laser intensity,which is consistent with the experimental results.The analysis shows that this transition is mainly due to the change of the recollision energy of the first electron with the laser intensity.

关 键 词：激光 库仑修正的量子轨迹 再碰撞激发电离 光强 

分 类 号：O562.4[理学—原子与分子物理]