Effect of Electron Initial Longitudinal Velocity on Low-Energy Structure in Above-Threshold Ionization Spectra
Effect of Electron Initial Longitudinal Velocity on Low-Energy Structure in Above-Threshold Ionization Spectra
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DOI：
10.1088/0256-307x/30/7/073202
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发表时间：
2013-07
影响因子：
3.5
通讯作者：
Wu Ming-yan;Wang Yan-lan;L. Xiaojun;Li Wei-dong;Hao Xiao-Lei;Chen Jing
中科院分区：
文献类型：
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作者：
Wu Ming-yan;Wang Yan-lan;L. Xiaojun;Li Wei-dong;Hao Xiao-Lei;Chen Jing
利用半经典模型，研究了隧道电离电子的初始纵向速度对阈上电离（ATI）谱中低能结构（LES）的影响。分析表明，初始纵向速度p（z0）对大涡模拟的影响（减弱或增强）与初始纵向速度的方向有关。对于隧穿时刻沿着激光电场方向的初始纵向速度（即，p（z0）> 0），光电子和离子核之间的库仑相互作用增强，而对于相反方向上的初始纵向速度（即，p（z0）< 0），库仑效应减小。我们的工作提供了坚实的证据，初始电子纵向速度有相当大的影响，在ATI过程中的光电子动力学。
Using a semiclassical model, we investigate the effect of the initial longitudinal velocity of the tunnel-ionized electron on low-energy structure (LES) in above-threshold ionization (ATI) spectra. Our analysis shows that the effect (reduction or enhancement) of the initial longitudinal velocity p(z0) on the LES is dependent on the direction of the initial longitudinal velocity. For the initial longitudinal velocity along the direction of the laser electric field at the moment of tunneling (i.e., p(z0) > 0), the Coulomb interaction between the photoelectron and ion core is enhanced, while for the initial longitudinal velocity in the opposite direction (i.e., p(z0) < 0), the Coulomb effect is reduced. Our work provides solid evidence that the initial electron longitudinal velocity has considerable effect on the photoelectron dynamics in the ATI process.