双色圆偏振飞秒脉冲驱动CO分子不对称解离  

Directional bond breaking of CO molecules by counter-rotating circularly polarized two-color laser fields

作　　者：林康[1] 宫晓春[1] 宋其迎 季琴颖 马俊杨 张文斌[1] 陆培芬[1] 曾和平[1] 吴健[1] 

机构地区：[1]华东师范大学、精密光谱科学与技术国家重点实验室,上海200062

出　　处：《物理学报》2016年第22期154-159,共6页Acta Physica Sinica

基　　金：上海市青年科技英才扬帆计划(批准号:16YF1402900)资助的课题~~

摘　　要：利用反旋圆偏振双色飞秒激光脉冲,结合电子-离子三维动量符合测量,实验研究了CO分子的单电离和双电离解离过程.在激光偏振平面内观测到碳离子C^+三叶草状的不对称动量分布.通过调节双色场中基频光和倍频光的相对相位,可以控制C^+的出射方向,实现CO分子的二维不对称解离.We experimentally studied the dissociative single and double ionization of CO molecules by counter-rotating circularly polarized two-color（CRTC） laser fields.By coincidently measuring the electrons and the fragmented ions,trefoil asymmetric momentum distributions of C~＋ in the polarization plane were observed,which are mainly determined by the selective ionization of CO with asymmetric orbitals.The threefold pattern could rotate continuously in the twodimensional space by finely tuning the relative phase of the CRTC fields,providing a new method to manipulate the directional bond breaking of molecules by strong laser fields.

关 键 词：超短激光脉冲 电离解离 双色光场 

分 类 号：O437[机械工程—光学工程]