Electron vortex generations in photoionization of hydrogen atoms by circularly-polarized chirped attosecond pulses

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外文摘要：By numerically solving the time-dependent Schrödinger equation and employing the analytical perturbative model,we investigated the chirp-induced electron vortex in the photoionization of hydrogen atoms by a pair of counter-rotating circularly polarized chirped attosecond extremely ultraviolet pulses.We demonstrated that single-photon ionization of hydrogen atoms generates photoelectron momentum distributions(PMDs)with distinct helical vortex structures either with or without a time delay between two counter-rotating circularly polarized laser pulses.These structures are highly sensitive to both the time delay between the pulses and their chirp parameters.Our analytical model reveals that the splitting of vortex spirals is caused by the sign changing of the chirp-induced frequency-dependent time delay.We showed that to obtain the counterpart of the PMD under a pair of counter-rotating circularly polarized chirped pulses,both chirp parameters and ordering of pulses need to be reversed.

外文关键词：

photoionizationultrafast processesultrafast dynamicselectron vortex

作者：

Bingshuang Zhang、Xiaoyu Liu、Fengzheng Zhu、Liguang Jiao、Aihua Liu

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作者单位：

Institute of Atomic and Molecular Physics,Jilin University,Changchun 130012,China

School of Mathematics and Physics,Hubei Polytechnic University,Huangshi 435003,China

College of Physics,Jilin University,Changchun 130012,China

Helmholtz-Institut Jena,D-07743 Jena,Germany

State Key Laboratory of Transient Optics and Photonics,Chinese Academy of Sciences,Xi'an 710119,China

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基金：

国家重点研发计划国家自然科学基金国家自然科学基金国家自然科学基金吉林省自然科学基金Open Research Fund of State Key Laboratory of Transient Optics and Photonics

项目编号：

2022YFE013420012174147918501141177413120220101016JC

出版年：

2024

DOI：

10.1088/1572-9494/ad1587

理论物理通讯(英文版)

中国科学院理论物理研究所中国物理学会

理论物理通讯(英文版)

CSTPCD

影响因子：0.333

ISSN：0253-6102

年,卷(期)：2024.76(1)

参考文献量48