Semiclassical investigation of Coulomb focusing effects in atomic above-threshold ionization with elliptically polarized laser fields
Semiclassical investigation of Coulomb focusing effects in atomic above-threshold ionization with elliptically polarized laser fields
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DOI：
10.1088/1674-1056/26/4/043201
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发表时间：
2017-04
影响因子：
1.7
通讯作者：
ChuanLiang Wang;L. Xia;H. Yao;Wen-liang Li
中科院分区：
文献类型：
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作者：
ChuanLiang Wang;L. Xia;H. Yao;Wen-liang Li
我们用半经典方法研究了椭圆偏振强激光场中原子的阈值以上电离。随着激光强度的增加，库仑聚焦效应在平行于偏振面和垂直于偏振面的方向上都变得更强。分析了隧道效应对隧道出口、初始横向动量分布和激光电场的依赖关系。结果表明，隧道出口的影响随着激光强度的变化最为显著，另外两个因素都起着不可忽视的作用。我们的结果为最近的库仑不对称实验提供了更深入的见解[Shafir D，等人，2013物理。莱特牧师。111 023005和李明等人，2013年物理。莱特牧师。111 023006]。
We investigate atomic above-threshold ionization in elliptically polarized strong laser fields with a semiclassical approach. With increasing laser intensity, the Coulomb focusing (CF) effects are found to become stronger in both parallel and perpendicular directions with respect to the polarization plane. The dependence of CF effects on tunnel exit, initial transverse momentum distribution and laser electric field is analyzed. It was revealed that the effects of tunnel exit are most prominent with variation of the laser intensity, and the other two factors both play non-negligible roles. Our results provide a deeper insight to the recent experiments of Coulomb asymmetry [Shafir D, et al., 2013 Phys. Rev. Lett. 111 023005 and Li M, et al., 2013 Phys. Rev. Lett. 111 023006].