中国物理B ›› 2024, Vol. 33 ›› Issue (1): 13303-13303.doi: 10.1088/1674-1056/ad011a

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Electron vortices generation of photoelectron of H2+ by counter-rotating circularly polarized attosecond pulses

Haojing Yang(杨浩婧)1, Xiaoyu Liu(刘晓煜)1, Fengzheng Zhu(朱风筝)2, Liguang Jiao(焦利光)3,4,†, and Aihua Liu(刘爱华)1,5,‡   

  1. 1 Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China;
    2 School of Mathematics and Physics, Hubei Polytechnic University, Huangshi 435003, China;
    3 College of Physics, Jilin University, Changchun 130012, China;
    4 Helmholtz-Institut Jena, D-07743 Jena, Germany;
    5 State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an 710119, China
  • 收稿日期:2023-08-31 修回日期:2023-09-28 接受日期:2023-10-07 出版日期:2023-12-13 发布日期:2024-01-03
  • 通讯作者: Liguang Jiao, Aihua Liu E-mail:lgjiao@jlu.edu.cn;aihualiu@jlu.edu.cn
  • 基金资助:
    Project supported by the Natural Science Foundation of Jilin Province, China (Grant No. 20220101016JC), the National Key Research and Development Program of China (Grant No. 2022YFE0134200), the National Natural Science Foundation of China (Grant Nos. 12174147, 91850114, and 11774131), the Open Research Fund of State Key Laboratory of Transient Optics and Photonics. Part of the numerical simulation was done on the high-performance computing cluster Tiger@IAMP in Jilin University.

Electron vortices generation of photoelectron of H2+ by counter-rotating circularly polarized attosecond pulses

Haojing Yang(杨浩婧)1, Xiaoyu Liu(刘晓煜)1, Fengzheng Zhu(朱风筝)2, Liguang Jiao(焦利光)3,4,†, and Aihua Liu(刘爱华)1,5,‡   

  1. 1 Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China;
    2 School of Mathematics and Physics, Hubei Polytechnic University, Huangshi 435003, China;
    3 College of Physics, Jilin University, Changchun 130012, China;
    4 Helmholtz-Institut Jena, D-07743 Jena, Germany;
    5 State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an 710119, China
  • Received:2023-08-31 Revised:2023-09-28 Accepted:2023-10-07 Online:2023-12-13 Published:2024-01-03
  • Contact: Liguang Jiao, Aihua Liu E-mail:lgjiao@jlu.edu.cn;aihualiu@jlu.edu.cn
  • Supported by:
    Project supported by the Natural Science Foundation of Jilin Province, China (Grant No. 20220101016JC), the National Key Research and Development Program of China (Grant No. 2022YFE0134200), the National Natural Science Foundation of China (Grant Nos. 12174147, 91850114, and 11774131), the Open Research Fund of State Key Laboratory of Transient Optics and Photonics. Part of the numerical simulation was done on the high-performance computing cluster Tiger@IAMP in Jilin University.

摘要: Molecular-frame photoelectron momentum distributions (MF-PMDs) of an H2+ molecule ion in the presence of a pair of counter-rotating circularly polarized attosecond extreme ultraviolet laser pulses is studied by numerically solving the two-dimensional time-dependent Schrödinger equation within the frozen-nuclei approximation. At small time delay, our simulations show that the electron vortex structure is sensitive to the time delay and relative phase between the counter-rotating pulses when they are partially overlapped. By adjusting time delay and relative phase, we have the ability to manipulate the MF-PMDs and the appearance of spiral arms. We further show that the internuclear distance can affect the spiral vortices due to its different transition cross sections in the parallel and perpendicular geometries. The lowest-order perturbation theory is employed to interpret these phenomena qualitatively. It is concluded that the internuclear distance-dependent transition cross sections and the confinement effect in diatomic molecules are responsible for the variation of vortex structures in the MF-PMDs.

关键词: photoelectron momentum distribution, attosecond pulse, vortex

Abstract: Molecular-frame photoelectron momentum distributions (MF-PMDs) of an H2+ molecule ion in the presence of a pair of counter-rotating circularly polarized attosecond extreme ultraviolet laser pulses is studied by numerically solving the two-dimensional time-dependent Schrödinger equation within the frozen-nuclei approximation. At small time delay, our simulations show that the electron vortex structure is sensitive to the time delay and relative phase between the counter-rotating pulses when they are partially overlapped. By adjusting time delay and relative phase, we have the ability to manipulate the MF-PMDs and the appearance of spiral arms. We further show that the internuclear distance can affect the spiral vortices due to its different transition cross sections in the parallel and perpendicular geometries. The lowest-order perturbation theory is employed to interpret these phenomena qualitatively. It is concluded that the internuclear distance-dependent transition cross sections and the confinement effect in diatomic molecules are responsible for the variation of vortex structures in the MF-PMDs.

Key words: photoelectron momentum distribution, attosecond pulse, vortex

中图分类号:  (Photon interactions with molecules)

  • 33.80.-b
42.65.Re (Ultrafast processes; optical pulse generation and pulse compression) 87.15.mn (Photoionization) 87.15.ht (Ultrafast dynamics; charge transfer)