Molecular photoelectron momentum and angular distributions of N2 molecules by ultrashort attosecond laser pulses

doi:10.1088/1674-1056/abca22

Abstract The ultrafast photoionization dynamics of N₂ molecules by x-ray/XUV laser pulses is investigated. The molecular frame photoelectron momentum distributions (MF-PMDs) and the molecular frame photoelectron angular distributions (MF-PADs) are obtained by numerically solving 2D time-dependent Schrödinger equations within the single-electron approximation (SEA) frame. The results show that the molecular photoionization diffraction appears in 5 nm laser fields. However, when the laser wavelength is 30 nm, the molecular photoionization diffraction disappears and the MF-PMDs show four-lobe pattern. The ultrafast photoionization model can be employed to describe the MF-PMDs and MF-PADs of N₂ molecules.

Keywords: N₂ molecules molecular frame photoelectron momentum distributions ultrafast photoionization model

Received: 10 September 2020
Revised: 03 November 2020
Accepted manuscript online: 13 November 2020

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 Nos. 12074146, 11974007, 12074142, 11904122, 91850114, and 11774131) and the Natural Science Foundation of Jilin Province of China (Grant No. 20180101225JC).

Corresponding Authors: ^†Corresponding author. E-mail: gjing@jlu.edu.cn

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Si-Qi Zhang(张思琪), Qi Zhen(甄琪), Zhi-Jie Yang(杨志杰), Jun Zhang(张军), Ai-Hua Liu(刘爱华), Kai-Jun Yuan(元凯军), Xue-Shen Liu(刘学深), and Jing Guo(郭静) Molecular photoelectron momentum and angular distributions of N₂ molecules by ultrashort attosecond laser pulses 2021 Chin. Phys. B 30 043201

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Molecular photoelectron momentum and angular distributions of N2 molecules by ultrashort attosecond laser pulses

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Molecular photoelectron momentum and angular distributions of N₂ molecules by ultrashort attosecond laser pulses