Dynamic stabilization of Na atom in an intense pulsed laser field

doi:10.1088/1674-1056/27/4/043201

Abstract We investigate theoretically the ionization properties of the valence electron for the alkali metal atom Na in an intense pulsed laser field by solving numerically the time-dependent Schrödinger equation with an accurate l-dependent model potential. By calculating the variations of the ionization probabilities with laser peak intensity for wavelengths ranging from 200 nm to 600 nm, our results present a dynamic stabilization trend for the Na atom initially in its ground state (3s) and the excited states (3p and 4s) exposed to an intense pulsed laser field. Especially a clear “window” of dynamic stabilization at lower laser intensities and longer wavelengths for the initial state 4s (the second excited state) is found. By analyzing the time-dependent population distributions of the valence electron in the bound states with the different values of principal quantum number n and orbital quantum number l, we can attribute the dynamic stabilization to the periodic population in the low-excited states since the valence electron oscillates rapidly between the lowly excited states and the continuum states.

Keywords: accurate model potential atomic dynamic stabilization ionization probability

Received: 11 December 2017
Revised: 03 January 2018
Accepted manuscript online:

PACS:	32.80.Rm	(Multiphoton ionization and excitation to highly excited states)
	42.50.Hz	(Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11465016, 11664035, and 11764038).

Corresponding Authors: Song-Feng Zhao, Xiao-Xin Zhou
E-mail: zhaosf@nwnu.edu.cn;zhouxx@nwnu.edu.cn

Cite this article:

Xiao-Li Guo(郭晓丽), Song-Feng Zhao(赵松峰), Guo-Li Wang(王国利), Xiao-Xin Zhou(周效信) Dynamic stabilization of Na atom in an intense pulsed laser field 2018 Chin. Phys. B 27 043201

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Dynamic stabilization of Na atom in an intense pulsed laser field

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