反向旋转圆偏振双色激光场驱动下氩原子非顺序双电离研究

doi:10.3969/j.issn.1000-5641.201922010

华东师范大学学报（自然科学版） ›› 2020, Vol. 2020 ›› Issue (2): 55-63.doi: 10.3969/j.issn.1000-5641.201922010

反向旋转圆偏振双色激光场驱动下氩原子非顺序双电离研究

钱丽洁, 杨岩, 孙真荣

华东师范大学精密光谱科学与技术国家重点实验室, 上海　200062

收稿日期:2019-04-23 发布日期:2020-03-16
通讯作者: 杨岩,男,工程师,研究方向为量子调控.E-mail:yyang@lps.ecnu.edu.cn;孙真荣,男,教授,博士生导师,研究方向为飞秒量子相干控制、光学材料、光生物物理.E-mail:zrsun@phy.ecnu.edu.cn E-mail:yyang@lps.ecnu.edu.cn;zrsun@phy.ecnu.edu.cn
基金资助:
国家自然科学基金（11727810）；上海市科委国际科技合作项目（16520721200）

Non-sequential double ionization of argon in counterrotating circularly polarized two-color laser fields

QIAN Lijie, YANG Yan, SUN Zhenrong

State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai　200062, China

Received:2019-04-23 Published:2020-03-16

摘要/Abstract

摘要： 在经典系综模型下, 研究了氩(Argon, Ar)原子在800 nm和400 nm反向旋转圆偏振双色(Counterrotating Circularly Polarized Two-Color, CRTC)激光场驱动下的非顺序双电离(Non-Sequential Double Ionization, NSDI)过程. 理论分析了激光强度、双色场强度比、脉冲相对相位, 以及激光脉冲宽度等光场参数对非顺序双电离机制及其量子产率的影响, 得到了双电子能量的时间演化谱; 发现并分析了两种不同的非顺序双电离机制; 讨论了电子返回碰撞能对不同非顺序双电离过程的影响.

关键词: 非顺序双电离, 双色激光场, 经典系综模型, 电子碰撞, 多电子动力学

Abstract: In this paper, the non-sequential double ionization (NSDI) process of Ar in 800 nm and 400 nm counterrotating circularly polarized two-color(CRTC) laser fields was studied using the classical ensemble model. The dependence of the non-sequential double ionization mechanism and quantum yield on laser intensity, laser intensity ratio, relative phase, and pulse duration of two pulses is calculated and analyzed in detail. The energy evolution of two electrons in the time domain is obtained and two different non-sequential double ionization mechanisms are revealed. The influence of the electron collision energy for different non-sequential double ionization processes is also discussed.

Key words: non-sequential double ionization(NSDI), two-color laser fields, classical ensemble model, electron collision, multi-electron dynamics

中图分类号:

O562.5

钱丽洁, 杨岩, 孙真荣. 反向旋转圆偏振双色激光场驱动下氩原子非顺序双电离研究[J]. 华东师范大学学报（自然科学版）, 2020, 2020(2): 55-63.

QIAN Lijie, YANG Yan, SUN Zhenrong. Non-sequential double ionization of argon in counterrotating circularly polarized two-color laser fields[J]. Journal of East China Normal University(Natural Science), 2020, 2020(2): 55-63.

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反向旋转圆偏振双色激光场驱动下氩原子非顺序双电离研究

Non-sequential double ionization of argon in counterrotating circularly polarized two-color laser fields

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