Strong-field response time and its implications on attosecond measurement  

作　　者：Chao Chen Jiayin Che Xuejiao Xie Shang Wang Guoguo Xin Yanjun Chen 陈超;车佳殷;谢雪娇;王赏;辛国国;陈彦军(College of Physics and Information Technology,Shaan'xi Normal University,Xi'an 710119,China;College of Physics and Hebei Key Laboratory of Photophysics Research and Application,Hebei Normal University,Shijiazhuang 050024,China;School of Physics,Northwest University,Xi'an 710127,China)

机构地区：[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

出　　处：《Chinese Physics B》2022年第3期16-23,共8页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.91750111);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 

分 类 号：TN24[电子电信—物理电子学] O56[理学—原子与分子物理]