Exploration of nonsequential-double-ionization dynamics of Mg atoms in linearly and circularly polarized laser fields with different potentials
Exploration of nonsequential-double-ionization dynamics of Mg atoms in linearly and circularly polarized laser fields with different potentials
复制标题
DOI：
10.1103/physreva.88.023405
复制
发表时间：
2013-08
影响因子：
2.9
通讯作者：
Jing Guo;Xue-shen Liu;S. Chu
中科院分区：
文献类型：
--
作者：
Jing Guo;Xue-shen Liu;S. Chu
研究了线偏振和圆偏振激光场中Mg原子的非顺序双电离（NSDI）。数值结果表明，在800 nm的圆偏振激光场中，在不同的势能下，仍然存在“膝”结构，这可以用相应的电子动量和位置分布来解释.此外，脉冲结束时Mg原子的电离电子能量也表明，线偏振和圆偏振情况下的再散射电子的行为是不同的。此外，我们还研究了不同势的脉冲末端的角分布，以说明线偏振和圆偏振情况下双电离机制的差异。
The nonsequential double ionization (NSDI) of Mg atoms is investigated in both linearly and circularly polarized laser fields with different kinds of potentials. The numerical results indicate that the “knee” structure still exists in circularly polarized laser fields in the 800-nm case with different potentials, which can be well explained by the corresponding momentum and position distribution of electrons. Moreover, the ionized electron energy of Mg atoms at the end of the pulse also shows that the behavior of rescattering electrons is different between linearly and circularly polarized cases. Besides, we also look into the angular distribution at the end of the pulse with different kind of potentials to illustrate the difference in the double-ionization mechanism between the linearly and circularly polarized cases.