期刊
CHINESE PHYSICS B
卷 31, 期 3, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1674-1056/ac29ab
关键词
response time; strong-field ionization; Coulomb effect; attosecond measurement
资金
- National Natural Science Foundation of China [91750111]
- National Key Research and Development Program of China [2018YFB0504400]
Measuring and controlling electron motion in atoms and molecules through strong laser fields on the attosecond time scale is a frontier of atomic and molecular photophysics research. Recent studies have shown that the Coulomb potential can cause ionization time lag, significantly impacting electron dynamics and time-frequency properties of electron trajectory.
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.
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