Above-threshold detachment of negative ions by circularly polarized few-cycle laser fields

作     者：白丽华 刘宇恒 崔婷婷 王燕 邓冬梅 张惠芳 

作者机构：Department of PhysicsShanghai University 

出 版 物：《Chinese Optics Letters》 (中国光学快报（英文版）)

年 卷 期：2011年第9卷第1期

页      面：5-8页

核心收录：

学科分类：070207[理学-光学] 07[理学] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China under Grant Nos.60908006 10804067 and 60407007 

主　　题：Angular distribution Anisotropy Electrons High energy physics Negative ions Photons 

摘      要：In accordance with nonperturbative quantum scattering theory, we investigate photoelectron angular distri- butions （PADs） from above-threshold detachment （ATD） of negative ions irradiated by circularly polarized few-cycle laser fields. Electrons ejected on the polarization plane demonstrate distinct anisotropies in an- gular distributions which distinctly vary with the carrier-envelope （CE） phase. The anisotropy is caused by interference between transition channels; it also depends strongly on laser frequency, pulse duration, and kinetic energy of photoelectrons. Optimal emission of photoelectrons, which varies with CE phase, makes it possible to control photoelectron motion.