Chinese Optics Letters, 2011, 9 (1): 010202, Published Online: Jan. 7, 2011
Above-threshold detachment of negative ions by circularly polarized few-cycle laser fields Download: 593次
Abstract
In accordance with nonperturbative quantum scattering theory, we investigate photoelectron angular distributions (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 angular 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.
Lihua Bai, Yuheng Liu, Tingting Cui, Yan Wang, Dongmei Deng, Huifang Zhang. Above-threshold detachment of negative ions by circularly polarized few-cycle laser fields[J]. Chinese Optics Letters, 2011, 9(1): 010202.