Photoelectron momentum distributions of Ne and Xe dimers in counter-rotating circularly polarized laser fields

doi:10.1088/1674-1056/ac4e05

Abstract The strong-field ionization of dimers is investigated theoretically in counter-rotating circularly polarized laser fields. By numerically solving the two-dimensional (2D) time-dependent Schrödinger equation (TDSE) with the single-electron approximation (SEA) frame, we present the photoelectron momentum distributions (PMDs) and photoelectron angular distribution (PADs) of aligned Ne and Xe dimers. It is found that the PMDs and PADs strongly depend on the time delays by counter-rotating circularly polarized laser pulses. The results can be explained by the ultrafast photoionization model and the evolution of electron wave packets for Ne and Xe dimers. Besides, We make a comparison of PMDs between Ne atom and Ne dimer.

Keywords: time-dependent Schrö dinger equation, dimer, photoelectron momentum distributions, ultrafast photoionization model

Received: 22 November 2021
Revised: 17 January 2022
Accepted manuscript online: 24 January 2022

PACS:	32.80.Rm	(Multiphoton ionization and excitation to highly excited states)
	32.80.Fb	(Photoionization of atoms and ions)
	42.50.Hz	(Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift)
	42.65.Re	(Ultrafast processes; optical pulse generation and pulse compression)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 12074146).

Corresponding Authors: Jing Guo
E-mail: gjing@jlu.edu.cn

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Zhi-Xian Lei(雷志仙), Qing-Yun Xu(徐清芸), Zhi-Jie Yang(杨志杰), Yong-Lin He(何永林), and Jing Guo(郭静) Photoelectron momentum distributions of Ne and Xe dimers in counter-rotating circularly polarized laser fields 2022 Chin. Phys. B 31 063202

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Photoelectron momentum distributions of Ne and Xe dimers in counter-rotating circularly polarized laser fields

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