Influence of wavelength on nonadiabatic effects in circularly polarized strong-field ionization
Influence of wavelength on nonadiabatic effects in circularly polarized strong-field ionization
复制标题
波长对圆偏振强场电离非绝热效应的影响
DOI：
10.1103/physreva.92.053405
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发表时间：
2015
影响因子：
2.9
通讯作者：
Liu HongPing
中科院分区：
文献类型：
--
作者：
Yuan MingHu;Zhao GuangJiu;Liu HongPing
通过求解三维球坐标系中氩原子单个激活电子的含时薛定谔方程，研究了波长对强圆偏振激光场中非绝热效应的影响。考虑电子初速度非零的非绝热过程对于再现实验观测是非常重要的。我们计算的光电子在垂直于偏振面方向上的角分布显示了强激光电离的非绝热效应。对与波长对应的“快”时间尺度上的角分布的分析表明，随着波长的变短，非绝热效应变强。而对脉冲包络对应的“慢”时间尺度的分析表明，短脉冲持续时间对非绝热效应起着重要作用。当脉冲宽度大于15个周期时，脉冲宽度对非绝热效应的影响逐渐消失，非绝热效应趋于稳定。
The influence of wavelength on nonadiabatic effects in an intensive, circularly polarized laser field has been studied by solving the time-dependent Schrodinger equation of a single active electron of the argon atom in a three-dimensional spherical coordinate system. The nonadiabatic process considering the nonzero initial velocity of the electron is very vital to reproducing the experimental observation. Our calculated photoelectron angular distribution in the directions perpendicular to the polarization plane shows nonadiabatic effects in strong laser ionization. The analysis of angular distribution on the "fast" time scale corresponding to wavelength indicates that as the wavelength gets shorter, the nonadiabatic effects get stronger. While the analysis on the "slow" time scale corresponding to the pulse envelope shows that the short pulse duration comes to play an important role for the nonadiabatic effects. When the pulse duration is more than 15 cycles, the influence of pulse duration on nonadiabatic effects fades away and the effects approach stabilization.