中国物理B ›› 2022, Vol. 31 ›› Issue (3): 33201-033201.doi: 10.1088/1674-1056/ac29ab

所属专题: SPECIAL TOPIC — Optical field manipulation

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Strong-field response time and its implications on attosecond measurement

Chao Chen(陈超)1,†, Jiayin Che(车佳殷)1,†, Xuejiao Xie(谢雪娇)1, Shang Wang(王赏)1,2, Guoguo Xin(辛国国)3,‡, and Yanjun Chen(陈彦军)1,§   

  1. 1 College of Physics and Information Technology, Shaan'xi Normal University, Xi'an 710119, China;
    2 College of Physics and Hebei Key Laboratory of Photophysics Research and Application, Hebei Normal University, Shijiazhuang 050024, China;
    3 School of Physics, Northwest University, Xi'an 710127, China
  • 收稿日期:2021-05-24 修回日期:2021-09-17 接受日期:2021-09-24 出版日期:2022-02-22 发布日期:2022-03-01
  • 通讯作者: Guoguo Xin, Yanjun Chen E-mail:xinguo@nwu.edu.cn;chenyjhb@gmail.com
  • 基金资助:
    Project supported by the National Natural Science Foun dation of China (Grant No. 91750111) and the National Key Research and Development Program of China (Grant No. 2018YFB0504400).

Strong-field response time and its implications on attosecond measurement

Chao Chen(陈超)1,†, Jiayin Che(车佳殷)1,†, Xuejiao Xie(谢雪娇)1, Shang Wang(王赏)1,2, Guoguo Xin(辛国国)3,‡, and Yanjun Chen(陈彦军)1,§   

  1. 1 College of Physics and Information Technology, Shaan'xi Normal University, Xi'an 710119, China;
    2 College of Physics and Hebei Key Laboratory of Photophysics Research and Application, Hebei Normal University, Shijiazhuang 050024, China;
    3 School of Physics, Northwest University, Xi'an 710127, China
  • Received:2021-05-24 Revised:2021-09-17 Accepted:2021-09-24 Online:2022-02-22 Published:2022-03-01
  • Contact: Guoguo Xin, Yanjun Chen E-mail:xinguo@nwu.edu.cn;chenyjhb@gmail.com
  • Supported by:
    Project supported by the National Natural Science Foun dation of China (Grant No. 91750111) and the National Key Research and Development Program of China (Grant No. 2018YFB0504400).

摘要: To measure and control the electron motion in atoms and molecules by the strong laser field on the attosecond time scale is one of the research frontiers of atomic and molecular photophysics. It involves many new phenomena and processes and raises a series of questions of concepts, theories, and methods. Recent studies show that the Coulomb potential can cause the ionization time lag (about 100 attoseconds) between instants of the field maximum and the ionization-rate maximum. This lag can be understood as the response time of the electronic wave function to the strong-field-induced ionization event. It has a profound influence on the subsequent ultrafast dynamics of the ionized electron and can significantly change the time—frequency properties of electron trajectory (an important theoretical tool for attosecond measurement). Here, the research progress of response time and its implications on attosecond measurement are briefly introduced.

关键词: response time, strong-field ionization, Coulomb effect, attosecond measurement

Abstract: To measure and control the electron motion in atoms and molecules by the strong laser field on the attosecond time scale is one of the research frontiers of atomic and molecular photophysics. It involves many new phenomena and processes and raises a series of questions of concepts, theories, and methods. Recent studies show that the Coulomb potential can cause the ionization time lag (about 100 attoseconds) between instants of the field maximum and the ionization-rate maximum. This lag can be understood as the response time of the electronic wave function to the strong-field-induced ionization event. It has a profound influence on the subsequent ultrafast dynamics of the ionized electron and can significantly change the time—frequency properties of electron trajectory (an important theoretical tool for attosecond measurement). Here, the research progress of response time and its implications on attosecond measurement are briefly introduced.

Key words: response time, strong-field ionization, Coulomb effect, attosecond measurement

中图分类号:  (Photoionization and excitation)

  • 32.80.-t
42.65.Re (Ultrafast processes; optical pulse generation and pulse compression) 42.50.Hz (Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift)