中国物理B ›› 2021, Vol. 30 ›› Issue (12): 123202-123202.doi: 10.1088/1674-1056/abf7a7

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Taking snapshots of a moving electron wave packet in molecules using photoelectron holography in strong-field tunneling ionization

Mingrui He(何明睿)1,†, Yang Fan(樊洋)1, Yueming Zhou(周月明)2, and Peixiang Lu(陆培祥)2   

  1. 1 Department of Basic Courses, Naval University of Engineering, Wuhan 430033, China;
    2 School of Physics and Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China
  • 收稿日期:2021-02-09 修回日期:2021-04-05 接受日期:2021-04-14 出版日期:2021-11-15 发布日期:2021-11-15
  • 通讯作者: Mingrui He E-mail:hmr_emma@163.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11874163, 11604108, and 11604388), the Program for HUST Academic Frontier Youth Team, and the Fundamental Research Funds for the Central Universities, China (HUST No. 2017KFXKJC002).

Taking snapshots of a moving electron wave packet in molecules using photoelectron holography in strong-field tunneling ionization

Mingrui He(何明睿)1,†, Yang Fan(樊洋)1, Yueming Zhou(周月明)2, and Peixiang Lu(陆培祥)2   

  1. 1 Department of Basic Courses, Naval University of Engineering, Wuhan 430033, China;
    2 School of Physics and Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China
  • Received:2021-02-09 Revised:2021-04-05 Accepted:2021-04-14 Online:2021-11-15 Published:2021-11-15
  • Contact: Mingrui He E-mail:hmr_emma@163.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11874163, 11604108, and 11604388), the Program for HUST Academic Frontier Youth Team, and the Fundamental Research Funds for the Central Universities, China (HUST No. 2017KFXKJC002).

摘要: Coherent superposition of electronic states induces attosecond electron motion in molecules. We theoretically investigate the strong-field ionization of this superposition state by numerically solving the time-dependent Schrödinger equation. In the obtained photoelectron momentum distribution, an intriguing bifurcation structure appears in the strong-field holographic interference pattern. We demonstrate that this bifurcation structure directly provides complete information about the status of the transient wave function of the superposition state:the horizontal location of the bifurcation in the momentum distribution reveals the relative phase of the involved components of the superposition state and the vertical position indicates the relative coefficient. Thus, this bifurcation structure takes a snapshot of the transient electron wave packet of the superposition state and provides an intuitive way to monitor electron motion in molecules.

关键词: strong-field ionization, photoelectron holography, charge migration

Abstract: Coherent superposition of electronic states induces attosecond electron motion in molecules. We theoretically investigate the strong-field ionization of this superposition state by numerically solving the time-dependent Schrödinger equation. In the obtained photoelectron momentum distribution, an intriguing bifurcation structure appears in the strong-field holographic interference pattern. We demonstrate that this bifurcation structure directly provides complete information about the status of the transient wave function of the superposition state:the horizontal location of the bifurcation in the momentum distribution reveals the relative phase of the involved components of the superposition state and the vertical position indicates the relative coefficient. Thus, this bifurcation structure takes a snapshot of the transient electron wave packet of the superposition state and provides an intuitive way to monitor electron motion in molecules.

Key words: strong-field ionization, photoelectron holography, charge migration

中图分类号:  (Multiphoton ionization and excitation to highly excited states)

  • 32.80.Rm
42.65.Re (Ultrafast processes; optical pulse generation and pulse compression) 32.80.Fb (Photoionization of atoms and ions)