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.
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.
基金
supported by the National Natural Science Foundation of China under Grant Nos.60908006,10804067,and 60407007
