Low-energy electron rescattering in laser-induced ionization
Low-energy electron rescattering in laser-induced ionization
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DOI：
10.1088/0953-4075/47/20/204022
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发表时间：
2014-10-28
影响因子：
1.6
通讯作者：
Paulus, G. G.
中科院分区：
文献类型：
--
作者：
Becker, W.;Goreslavski, S. P.;Paulus, G. G.
从三个不同的角度重新研究了稀有气体原子阈值以上电离能谱中的低能结构（LES）。首先，考虑前向重散射在完全经典的简单人模型（SMM）中的作用。然后，在增强的强场近似中导出的量子机械电离振幅中检索相应的经典电子轨迹，以允许重新散射。第三，仔细检查激光场和库仑场存在下的经典轨迹，以了解它们与 LES 的关系。结论是，LES已经扎根于SMM。库仑场增强了结构，使其能够成功地与其他贡献竞争并在总光谱中变得可见。
The low-energy structure (LES) in the energy spectrum of above-threshold ionization of rare-gas atoms is reinvestigated from three different points of view. First, the role of forward rescattering in the completely classical simple-man model (SMM) is considered. Then, the corresponding classical electronic trajectories are retrieved in the quantum-mechanical ionization amplitude derived in the strong-field approximation augmented to allow for rescattering. Third, classical trajectories in the presence of both the laser field and the Coulomb field are scrutinized in order to see how they are related to the LES. It is concluded that the LES is already rooted in the SMM. The Coulomb field enhances the structure so that it can successfully compete with other contributions and become visible in the total spectrum.