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Chin. Phys. B, 2019, Vol. 28(5): 053201    DOI: 10.1088/1674-1056/28/5/053201
ATOMIC AND MOLECULAR PHYSICS Prev   Next  

Dependence of photoelectron-momentum distribution of H2+ molecule on orientation angle and laser ellipticity

Hong-Dan Zhang(张宏丹)1, Si-Qi Zhang(张思琪)1, Lei Ji(纪磊)2, Qi Zhen(甄琪)1, Jing Guo(郭静)1, Xue-Shen Liu(刘学深)1
1 Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China;
2 School of Physics and Electronic Technology, Liaoning Normal University, Dalian 116029, China
Abstract  

By numerically solving the two-dimensional time-dependent Schrödinger equation under the frozen-nuclei approximation, we are able to study the molecular photoelectron-momentum distribution (MPMD) of H2+ with different orientation angles driven by elliptically polarized laser pulse with varying ellipticities. Our numerical results show that the MPMD is sensitive to the orientation angle and the laser ellipticity, which can be explained by the attosecond perturbation ionization theory and the exactly solvable photoionization model. When the ellipticity ε=0, the final MPMD of x-oriented H2+ shows a distinct six-lobe pattern that is different from that with ε=0.5 and ε=1. The evolutions of electron wave packet (EWP) and MPMD with x-oriented H2+ are presented to interpret this distinct pattern.

Keywords:  H2+ molecule      molecular photoelectron-momentum distribution      attosecond perturbation ionization theory  
Received:  15 February 2019      Revised:  07 March 2019      Accepted manuscript online: 
PACS:  32.80.Rm (Multiphoton ionization and excitation to highly excited states)  
  32.80.Fb (Photoionization of atoms and ions)  
  42.65.Re (Ultrafast processes; optical pulse generation and pulse compression)  
Fund: 

Project supported by the National Natural Science Foundation of China (Grant Nos. 11271158, 11574117, and 61575077) and the Natural Science Foundation of Jilin Province of China (Grants No. 20180101225JC).

Corresponding Authors:  Jing Guo, Xue-Shen Liu     E-mail:  gjing@jlu.edu.cn;liuxs@jlu.edu.cn

Cite this article: 

Hong-Dan Zhang(张宏丹), Si-Qi Zhang(张思琪), Lei Ji(纪磊), Qi Zhen(甄琪), Jing Guo(郭静), Xue-Shen Liu(刘学深) Dependence of photoelectron-momentum distribution of H2+ molecule on orientation angle and laser ellipticity 2019 Chin. Phys. B 28 053201

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