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飞秒激光场中原子/分子的隧道电离及应用

Tunneling Ionization of Atoms and Molecules in Femtosecond-Laser Fields and its Applications

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摘要

综述了强激光场作用下原子的光电离动力学最新进展,着重分析了非绝热隧道电离中的隧穿出口光电子动量分布,得到分子坐标系中隧道电子角分布,实现分子内层轨道成像;采用电场矢量同向旋转的双色(400 nm+800 nm)圆偏振激光实现双指针阿秒钟干涉技术,该技术可以测量光电子波包的相位和振幅;基于具有较大自旋-轨道耦合效应的原子(氙原子),通过圆偏振激光中的多光子电离过程,可产生具有高自旋极化度的光电子。最后对目前超快强场物理的研究前景和发展趋势进行简单的介绍。

Abstract

Herein, we review the recent progress in the electron dynamics of optical ionization using ultraintense laser fields. Further, the photoelectron momentum distributions at the tunnel exit during nonadiabatic tunneling ionization are analyzed. The electron angular distributions are obtained in terms of molecular coordinates, allowing the imaging of the molecular inner orbits. The two-color (400 nm+800 nm) circularly polarized laser fields are used to achieve a double-pointer attoclock in which the phase and amplitude of the electronic wavepackets can be characterized. Furthermore, the photoelectrons with a high degree of spin polarization can be produced using circular laser fields based on the ionization of atoms with large spin-orbit coupling effects. Finally, the applications of ultrafast strong field physics and its developmental trend are illustrated.

Newport宣传-MKS新实验室计划
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中图分类号:O562

DOI:10.3788/cjl201946.0508017

所属栏目:“超快激光非线性光学”专题

基金项目:国家自然科学基金(11434002,11774013,11527901)

收稿日期:2018-12-18

修改稿日期:2019-02-20

网络出版日期:2019-03-01

作者单位    点击查看

郭振宁:北京大学物理学院人工微结构与介观物理国家重点实验室, 北京 100871
马雪岩:北京大学物理学院人工微结构与介观物理国家重点实验室, 北京 100871
韩猛:北京大学物理学院人工微结构与介观物理国家重点实验室, 北京 100871
葛佩佩:北京大学物理学院人工微结构与介观物理国家重点实验室, 北京 100871
刘明明:北京大学物理学院人工微结构与介观物理国家重点实验室, 北京 100871
刘运全:北京大学物理学院人工微结构与介观物理国家重点实验室, 北京 100871

联系人作者:郭振宁(guozhn18@pku.edu.cn); 韩猛(menghan@pku.edu.cn); 刘运全(yunquan.liu@pku.edu.cn);

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引用该论文

Guo Zhenning,Ma Xueyan,Han Meng,Ge Peipei,Liu Mingming,Liu Yunquan. Tunneling Ionization of Atoms and Molecules in Femtosecond-Laser Fields and its Applications[J]. Chinese Journal of Lasers, 2019, 46(5): 0508017

郭振宁,马雪岩,韩猛,葛佩佩,刘明明,刘运全. 飞秒激光场中原子/分子的隧道电离及应用[J]. 中国激光, 2019, 46(5): 0508017

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