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Chin. Phys. B, 2021, Vol. 30(4): 043201    DOI: 10.1088/1674-1056/abca22
ATOMIC AND MOLECULAR PHYSICS Prev   Next  

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

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)
1 Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China
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   

Cite this article: 

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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