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.
© 2011 Chinese Optics Letters
Lihua Bai, Yuheng Liu, Tingting Cui, Yan Wang, Dongmei Deng, and Huifang Zhang, "Above-threshold detachment of negative ions by circularly polarized few-cycle laser fields," Chin. Opt. Lett. 9, 010202- (2011)