Electrons in intense laser fields with local phase, polarization, and skyrmionic textures

J. Wätzel, J. Berakdar
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引用次数: 3

Abstract

Laser fields can be shaped on a subwavelength scale as to have a specific distribution in spin angular momentum, orbital structure, or topology. We study how these various features affect the strongly nonlinear electron dynamics. Specifically, we derive closed expressions for the wave function of an unbound electron subject to a generally structured, intense laser field and demonstrate its use for imprinting the orbital angular momentum of a propagating optical vortex onto photoelectrons emitted from atoms and traveling through the optical vortex. It is also shown that photoelectrons can be accelerated or momentum textured when moving through a focused, intense laser field whose spin angular momentum is modulated as to have a radial polarization, which also implies the presence of a strong electrical longitudinal component. Further results are presented on the subwavelength spatiotemporal imaging of a laser field topology, as demonstrated explicitly for the field's spin and orbital distributions of lossless propagating optical skyrmions imaged by photoelectrons.
强激光场中的电子与局域相、极化和天空粒子织构
激光场可以在亚波长尺度上形成,以便在自旋角动量、轨道结构或拓扑结构中具有特定的分布。我们研究了这些不同的特征如何影响强非线性电子动力学。具体地说,我们推导了受一般结构强激光场作用的非束缚电子的波函数的封闭表达式,并演示了它用于将传播的光学涡旋的轨道角动量印印到从原子发射并穿过光学涡旋的光电子上。研究还表明,光电子在经过聚焦的强激光场时可以被加速或动量纹理化,该激光场的自旋角动量被调制为具有径向极化,这也意味着存在强的电纵向分量。进一步研究了激光场拓扑的亚波长时空成像,明确地证明了光电子成像的无损传播光学天空粒子的场自旋和轨道分布。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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