Relative phase effect of nonsequential double ionization in Ar by two-color elliptically polarized laser field

doi:10.1088/1674-1056/ab5d03

Abstract We investigated the nonsequential double ionization (NSDI) in Ar by two-color elliptically polarized laser field with a three-dimensional (3D) classical ensemble method. We study the relative phase effect of NSDI and distinguish two particular recollision channels in NSDI, which are recollision-impact ionization (RII) and recollision-induced excitation with subsequent ionization (RESI), according to the delay-time between the recollision and the final double ionization. The numerical results indicate that the ion momentum distribution is changed and the triangle structure is more obvious with the decrease of the relative phase. We also demonstrate that the RESI process always dominates in the whole double ionization process and the ratio of RESI and RII channels can be influenced by the relative phase.

Keywords: nonsequential double ionization two-color elliptically polarized laser field recollision-impact ionization recollision-induced excitation with subsequent ionization

Received: 18 October 2019
Revised: 11 November 2019
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)
	42.65.Ky	(Frequency conversion; harmonic generation, including higher-order harmonic generation)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61575077) and the Natural Science Foundation of Jilin Province of China (Grant No. 20180101225JC).

Corresponding Authors: Xue-Shen Liu
E-mail: liuxs@jlu.edu.cn

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Jia-He Chen(陈佳贺), Tong-Tong Xu(徐彤彤), Tao Han(韩涛), Yue Sun(孙悦), Qing-Yun Xu(徐清芸), Xue-Shen Liu(刘学深) Relative phase effect of nonsequential double ionization in Ar by two-color elliptically polarized laser field 2020 Chin. Phys. B 29 013203

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Relative phase effect of nonsequential double ionization in Ar by two-color elliptically polarized laser field

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