Acta Optica Sinica, Volume. 41, Issue 1, 0102001(2021)
Recent Research Advances in Strong-Field Atomic Tunneling Ionization
Light-matter interaction is always one of the themes of science. With the rapid development of ultra-short and ultra-strong laser techniques, nowadays we can research the internal world in a single atom and control the light-electron interactions to explore the ultrafast dynamics of intra-atomic electrons. Laser-induced tunneling ionization of atoms, as the footstone of many strong-field physical phenomena, has important research significance and is also one of the hot frontier topics. In this paper, we review the recent research advances in strong-field atomic tunneling ionization. The coordinate and momentum distributions of electrons after tunneling process are obtained based on the non-adiabatic tunneling ionization in the natural coordinates (i.e., the parabolic coordinates). We introduce the theoretical description and experimental measurement methods for the initial phase (i.e., the sub-barrier phase) of electrons obtained in the tunneling process. Based on the sub-barrier phase, we can reveal the quantum dynamical information of the tunneling process. We introduce the recent advances in photoelectron spin polarization during the strong-field tunneling ionization. On the basis of the orthogonal two-color fields, the degrees of freedom of photoelectrons in the time and space dimensions can be accurately controlled. Finally, we summarize this paper and predict future research advances.
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Yunquan Liu, Meng Han. Recent Research Advances in Strong-Field Atomic Tunneling Ionization[J]. Acta Optica Sinica, 2021, 41(1): 0102001
Category: Atomic and Molecular Physics
Received: Aug. 20, 2020
Accepted: Sep. 8, 2020
Published Online: Feb. 23, 2021
The Author Email: Liu Yunquan (yunquan.liu@pku.edu.cn)