Influence of the Coulomb potential on above-threshold ionization: A quantum-orbit analysis beyond the strong-field approximation
Influence of the Coulomb potential on above-threshold ionization: A quantum-orbit analysis beyond the strong-field approximation
复制标题
库仑势对阈值以上电离的影响：强场近似之外的量子轨道分析
DOI：
10.1103/physreva.92.043407
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发表时间：
2015-10-08
影响因子：
2.9
通讯作者：
Faria, C. Figueira de Morisson
中科院分区：
文献类型：
--
作者：
Lai, X-Y.;Poli, C.;Faria, C. Figueira de Morisson
我们进行了详细的分析，如何之间的相互作用的剩余结合势和强激光场的影响阈值以上电离（ATI），采用半解析，库仑校正强场近似（SFA），其中库仑势被纳入电子在连续介质中的传播。我们发现，库仑相互作用升降机的一些SFA轨迹的简并性，我们确定了一组轨道，足够高的光电子能量，可能与再散射。此外，通过与标准SFA进行直接比较，我们发现ATI谱中的几个特征可以追溯到库仑势对不同电子轨迹的影响。这些特征包括对比度的降低、干涉子结构向较低能量的转变以及光电子产率的总体增加。所有遇到的功能表现出很好的协议与从头算解的含时薛定谔方程。
We perform a detailed analysis of how the interplay between the residual binding potential and a strong laser field influences above-threshold ionization (ATI), employing a semianalytical, Coulomb-corrected strong-field approximation (SFA) in which the Coulomb potential is incorporated in the electron propagation in the continuum. We find that the Coulomb interaction lifts the degeneracy of some SFA trajectories and we identify a set of orbits that, for high enough photoelectron energies, may be associated with rescattering. Furthermore, by performing a direct comparison with the standard SFA, we show that several features in the ATI spectra can be traced back to the influence of the Coulomb potential on different electron trajectories. These features include a decrease in the contrast, a shift towards lower energies in the interference substructure, and an overall increase in the photoelectron yield. All features encountered exhibit very good agreement with the ab initio solution of the time-dependent Schrodinger equation.