Double ionization of H 2 in a co-rotating two-color circularly polarized (TCCP) laser field is theoretically investigated. By changing the ratio of electric field peak amplitudes of the TCCP laser pulses, the double ionization probability as a function of the laser intensity shows a clear knee structure, which is suppressed significantly in the case of the atom. Due to the large spatial range of the electronic initial distribution, with the analysis of classical trajectories of ionized electrons, it is found that the ionization of the electron in the farther distance increases the probability of recollision. Furthermore, the yield of nonsequential double ionization created by the recollision can be enhanced by controlling the amplitude ratio of the TCCP laser field.

中文翻译：

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同向旋转双色圆偏振激光场中H 2的强场双电离动力学

理论上研究了同向旋转双色圆偏振（TCCP）激光场中H 2的双电离。通过改变TCCP激光脉冲的电场峰值幅度的比率，双电离概率作为激光强度的函数显示出清晰的膝盖结构，在原子的情况下，这种结构显着受到抑制。由于电子初始分布的空间范围较大，因此通过对电离电子的经典轨迹进行分析，发现电子在更远距离内的电离会增加发生碰撞的可能性。此外，通过控制TCCP激光场的振幅比，可以提高由再碰撞产生的非顺序双电离的产量。