Electron Vortices in Photoionization by Circularly Polarized Attosecond Pulses
Electron Vortices in Photoionization by Circularly Polarized Attosecond Pulses
复制标题
DOI：
10.1103/physrevlett.115.113004
复制
发表时间：
2015-09-10
影响因子：
8.6
通讯作者：
Starace, Anthony F.
中科院分区：
文献类型：
--
作者：
Djiokap, J. M. Ngoko;Hu, S. X.;Starace, Anthony F.
单电离的He由两个相反的圆偏振，时间延迟的阿秒脉冲被示出产生光电子动量分布在偏振平面具有螺旋涡旋结构敏感的脉冲之间的时间延迟，它们的相对相位，和它们的手。结果得到的两个从头算数值解的双电子含时薛定谔方程和最低阶微扰理论分析。阿秒脉冲的能量、带宽和持续时间是观测这些涡旋模式的理想条件。
Single ionization of He by two oppositely circularly polarized, time-delayed attosecond pulses is shown to produce photoelectron momentum distributions in the polarization plane having helical vortex structures sensitive to the time delay between the pulses, their relative phase, and their handedness. Results are obtained by both ab initio numerical solution of the two-electron time-dependent Schrodinger equation and by a lowest-order perturbation theory analysis. The energy, bandwidth, and temporal duration of attosecond pulses are ideal for observing these vortex patterns.