Attosecond Streaking in the Low-Energy Region

28th International Conference on Photonic, Electronic and Atomic Collisions

Geng, Ji-Wei^1 ; Peng, Liang-You^1 ; Xu, Ming-Hui^1 ; Gong, Qihuang^1

State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing

100871, China^1

关键词: Holographic imaging;    Interference patterns;    Low energy regions;    Molecular potential;    Momentum distributions;    Semiclassical model;    Single attosecond pulse;    Strong-field approximations;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/488/1/012003/pdf
DOI  :  10.1088/1742-6596/488/1/012003

来源: IOP

【 摘 要 】

The low-energy photonelectron (PEs) ionized by a single attosecond pulse can be controlled by a moderately intense infrared field (IR). The electric field of the IR pulse can drive part of the PEs back to the parent ion and induce multiple rescattering of the electrons. Interesting interference patterns are observed in the photoelectron momentum distributions, which are formed by the rescattered electrons and the directly ionized PEs. By analyzing the interference patterns with a simple semiclassical model, which considers the particular PE trajectories incorporating the rescattering with the core, we demonstrate that the low-energy attosecond streaking offers a promising method of holographic imaging of atomic and molecular potential. In addition, we show that neither strong field approximation (SFA) or Coulomb-Volkov approximation (CVA) is able to reproduce these interesting structures at the low energy region.