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在循环极化激光场中, Xe 原子对电子相关动态的非双极效应

Yankun Dou¹, Peizeng Li¹, Xiaoxiao Long¹

¹Peking University, State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-Optoelectronics, School of Physics, Beijing 100871, China.

Physical review letters

|March 6, 2026

概括

双电离中的非双极效应揭示了低能电子的增强动量转移,偏离了顺序模型. 这突显了电子相关性和动量转移在强激光物质相互作用中的作用.

科学领域:

原子,分子和光学物理学
量子光学是一种量子光学.
强场物理强场物理

背景情况:

强场双电离是一种复杂的量子现象.
非二极效应,即偏离二极近似的偏差,在激烈的激光物质相互作用中至关重要.
了解电子相关性和动量转移是解开电离化动态的关键.

研究的目的:

实验和理论研究强场双离子化的非双极效应.
分析 Xe^{2+} 离子和相关电子的动量分布.
为了研究光电子动量转移及其与非双极效应的关系.

主要方法:

联合实验和理论研究使用循环极化800nm激光场.
测量X^2+} 离子和相关的两电子动量分布.
开发和应用一个非双极校正的两电子经典轨迹蒙特卡洛 (CTMC) 模型.

主要成果:

在激光极化平面中观察到Xe^{2+}离子的高斯运动量分布.
在相关的两电子动量分布中揭示了明显的四叶形结构.
测量了由于非双极效应导致的低能电子的增强光电子动量转移,这与回碰撞引起的动量再分配有关.
解决了顺序和非顺序双电离的明显的角度发射模式.

结论:

非双极效应在强场双电离过程中的电子相关性中起着重要作用.
这项研究为激烈的激光物质相互作用中的多体线性动量转移提供了新的见解.
开发的CTMC模型准确地复制实验观测结果,验证了对非双极效应的理解.

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