We investigate the nonsequential double ionization (NSDI) of linear triatomic molecules by the counter-rotating two-color circularly polarized (CRTC) laser fields with a classical ensemble method. The results of the simulation reveal that NSDI yield strongly connected with the relative phase. The trajectory tracking method shows that the return time of the electron is controlled by the relative phase. In addition, when we change the CRTC laser wavelengths, the relative phase of the maximum and minimum yield of NSDI also changes. This shows that the influence of the Coulomb potential in the triatomic molecules on the electron return process cannot be ignored. This work will effectively promote the electronic dynamics study of NSDI for the triatomic molecule.

我们使用经典的集成方法通过反向旋转的双色圆偏振 (CRTC) 激光场研究线性三原子分子的非连续双电离 (NSDI)。模拟结果表明，NSDI 产量与相对相位密切相关。轨迹跟踪法表明电子的返回时间受相对相位控制。此外，当我们改变 CRTC 激光波长时，NSDI 最大和最小良率的相对相位也会发生变化。这说明三原子分子中的库仑势对电子返回过程的影响是不可忽视的。这项工作将有效促进NSDI对三原子分子的电子动力学研究。