中国物理B ›› 2021, Vol. 30 ›› Issue (1): 13201-.doi: 10.1088/1674-1056/abb30c

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  • 收稿日期:2020-07-02 修回日期:2020-08-13 接受日期:2020-08-27 出版日期:2020-12-17 发布日期:2021-01-13

Ultrafast photoionization of ions and molecules by orthogonally polarized intense laser pulses: Effects of the time delay

Si-Qi Zhang(张思琪), Zhi-Jie Yang(杨志杰), Zhi-Xian Lei(雷志仙), Wei Feng(冯伟), Sheng-Peng Zhou(周胜鹏), 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
  • Received:2020-07-02 Revised:2020-08-13 Accepted:2020-08-27 Online:2020-12-17 Published:2021-01-13
  • Contact: †Corresponding author. E-mail: gjing@jlu.edu.cn ‡Corresponding author. E-mail: liuxs@jlu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 12074146, 21827805, 11974007, and 12074142) and the Natural Science Foundation of Jilin Province of China (Grant No. 20180101225JC).

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Abstract: We present the photoelectron momentum distributions (PMDs) and the photoelectron angular distributions (PADs) of He+ ions, aligned H2+ molecules and N2 molecules by intense orthogonally polarized laser pulses. Simulations are performed by numerically solving the corresponding two-dimensional time-dependent Schrödinger equations (TDSEs) within the single-electron approximation frame. Photoelectron momentum distributions and photoelectron angular distributions present different patterns with the time delays T d, illustrating the dependences of the PMDs and PADs on the time delays by orthogonally polarized laser pulses. The evolution of the electron wavepackets can be employed to describe the intensity of the PADs from the TDSE simulations for N2 molecules.

Key words: photoelectron momentum distributions, photoelectron angular distributions, intense orthogonally polarized laser pulses, ultrafast photoionization model

中图分类号:  (Multiphoton ionization and excitation to highly excited states)

  • 32.80.Rm
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)