线偏激光下 Xe 原子光电子动量分布中全息干涉结构的探究

doi:10.14139/j.cnki.cn22-1228.2024.01.001

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摘要

采用量子蒙特卡洛的方法探究了脉宽、相位以及库仑势对线偏振激光下 Xe 原子光电子动量分布中全息干涉结构的影响。结果表明，随着脉宽的增加逐渐出现干涉结构，当脉宽为一个光学周期时形成一个完整的“蜘蛛状”全息干涉结构。“蜘蛛状”结构对相位很敏感，通过对相位的调控可以使全息干涉条纹消失和重现，并且相位差为 π 的光电子动量分布呈反演对称分布。此外证明了库仑势主要影响全息干涉结构的形成，不考虑库仑势时全息干涉结构消失，只有双缝干涉结构出现。这一结果为实验上干涉条纹调控提供了有效手段，同时有利于超快电子动力学信息的提取。

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	张子洋
	李晓丹
	刘冰
	谢欣悦
	王思凡
	李心月
	孙悦宁
	肖竹
	于伟威

关键词: 线偏振激光场光电子动量分布全息干涉

Abstract:

The influence of pulse width，phase，and Coulomb potential on the holographic interference structure in the photoelectron momentum distribution from Xe atoms is investigated using the quantum Monte Carlo method under a linearly polarized laser pulse．The results show that the interference structure gradually appears with the increase of pulse width，and a complete spider-like holographic interference structure is formed when the pulse width is an optical cycle．The spider-like structure is sensitive to the phase，and the holographic interference fringes can disappear and reappear by adjusting the phase，and the photoelectron momentum distribution with phase difference π is inversion symmetry．In addition，it is proved that the Coulomb potential mainly affects the formation of the holographic interference structure． When the Coulomb potential is not considered，the holographic interference structure disappears and only the double-slit interference structure appears．This result provides an effective means for experimentally regulating interference fringes，which is beneficial for extracting ultrafast electron dynamics information．

Key words: linearly polarized laser field photoelectron momentum distribution holographic interference

出版日期: 2024-02-25 发布日期: 2024-02-25 整期出版日期: 2024-02-25

ZTFLH:

O 562.4

引用本文:

张子洋, 李晓丹, 刘冰, 谢欣悦, 王思凡, 李心月, 孙悦宁, 肖竹, 于伟威 . 线偏激光下 Xe 原子光电子动量分布中全息干涉结构的探究 [J]. 大学物理实验, 2024, 37(1): 1-6.
ZHANG Ziyang, LI Xiaodan, LIU Bing, XIE Xinyue, WANG Sifan, LI Xinyue, SUN Yuening, XIAO Zhu, YU Weiwei . Exploration of the Holographic Interference Structure in the Photoelectron Momentum Distribution of Xe Atoms under a Linearly Polarized Laser Pulse . Physical Experiment of College, 2024, 37(1): 1-6.

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http://dawushiyan.jlict.edu.cn/CN/10.14139/j.cnki.cn22-1228.2024.01.001 或 http://dawushiyan.jlict.edu.cn/CN/Y2024/V37/I1/1

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