Relative phase effect of nonsequential double ionization (NSDI) of aligned molecules by counter-rotating two-color circularly polarized (TCCP) fields is investigated with a three-dimensional classical ensemble model. Numerical results show that NSDI yield in counter-rotating TCCP fields sensitively depends on the relative phase of the two components, which exhibits a sin-like behavior with the period of π/2. NSDI yield achieves its maximum at the relative phase π/8 and minimum at 3π/8. Back analysis indicates the recollision time and the return angle of the electron strongly depend on the relative phase of the two components, which results in the dominant emission direction of the electrons, is different for different relative phases. This indicates that the recollision process can be steered by changing the relative phase of the two components in counter-rotating TCCP laser fields. Meantime, it provides an avenue to obtain information about the recollision time and the return angle in the recollision process from the electron momentum distribution.

中文翻译：

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反向旋转双色圆偏振场的分子非顺序双电离的相对相位效应

使用三维经典集成模型研究了通过反向旋转两色圆极化（TCCP）场而排列的分子的非顺序双电离（NSDI）的相对相位效应。数值结果表明，在反向旋转的TCCP场中，NSDI的产量敏感地取决于两个分量的相对相位，在π / 2的周期内呈现出类似sin的行为。NSDI产量在相对相位达到其最大值π / 8和最小值在3 π/ 8。反分析表明，电子的再碰撞时间和返回角在很大程度上取决于两个组分的相对相位，这导致电子的主要发射方向对于不同的相对相位而言是不同的。这表明可以通过改变反向旋转TCCP激光场中两个分量的相对相位来控制重新碰撞过程。同时，它提供了一种从电子动量分布中获取重碰撞过程中的重碰撞时间和返回角度信息的途径。