论文标题
分子旋转辅助非顺序双电离
Molecular rotation assisted non-sequential double ionization
论文作者
论文摘要
分子旋转辅助的非顺序双电离（MR-NSDI）机制在旋转H $ _2 $分子的破裂中鉴定出使用半经典轨迹的Monte Carlo方法中的几个周期激光脉冲。在适当的旋转状态下应用分子源可以强烈提高NSDI概率，并以额外的较小的抗相关电子动量分布得出结论。它揭示了分子旋转的连续动力学的关键作用，该动力学有助于回忆过程，并随后从分子旋转引起的潜在门户中释放出激发电子。发现两个潜在的出口通道有助于MR-NSDI，即隧穿电离（以增强电离）和直接电离为主导。这两个通道被确认具有不同的关键分解内部距离距离。 $（-30^{\ Circ}，30^{\ Circ}）$沿激光极化方向的突出核排放被确定为MR-NSDI的签名。
A molecular rotation assisted non-sequential double ionization (MR-NSDI) mechanism is identified in the breakup of rotational H$_2$ molecules in a few-cycle intense laser pulse using a semi-classical trajectory Monte Carlo method. Applying a molecular source in an appropriate rotational state could intensively boost NSDI probability, and conclude with an additional small anti-correlated electron momentum distribution. It reveals the critical role of the continuous dynamics of molecular rotation, which assists the recollision process and subsequently releases the excited electron from the potential portal resulted from molecular rotation. Two underlying exit channels are found to contribute to MR-NSDI, i.e. tunneling ionization (dominated by enhanced ionization) and direct ionization. The two channels are confirmed to have different critical breakup internuclear distances. A prominent nuclear emission in $(-30^{\circ},30^{\circ})$ along the laser polarized direction is identified to be a signature of MR-NSDI.
