中国物理B ›› 2015, Vol. 24 ›› Issue (4): 43202-043202.doi: 10.1088/1674-1056/24/4/043202

• ATOMIC AND MOLECULAR PHYSICS • 上一篇    下一篇

Influence of multi-photon excitation on the atomic above-threshold ionization

田原野a b, 王春成a b, 李苏宇a b, 郭福明a b, 丁大军a b, Roeterdink Wim-Ga b, 陈基根c, 曾思良d e, 刘学深a b, 杨玉军a b   

  1. a Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China;
    b Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy, Jilin University, Changchun 130012, China;
    c Department of Physics and Materials Engineering, Taizhou University, Taizhou 318000, China;
    d Data Center for High Energy Density Physics, Institute of Applied Physics and Computational Mathematics, Beijing 100088, China;
    e Science and Technology Computational Physics Laboratory, Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
  • 收稿日期:2014-10-17 修回日期:2014-11-13 出版日期:2015-04-05 发布日期:2015-04-05
  • 基金资助:

    Project supported by the National Basic Research Program of China (Grant No. 2013CB922200), the National Natural Science Foundation of China (Grants Nos. 11274141, 11034003, 11304116, 11274001, and 11247024), and the Jilin Provincial Research Foundation for Basic Research, China (Grant No. 20140101168JC).

Influence of multi-photon excitation on the atomic above-threshold ionization

Tian Yuan-Ye (田原野)a b, Wang Chun-Cheng (王春成)a b, Li Su-Yu (李苏宇)a b, Guo Fu-Ming (郭福明)a b, Ding Da-Jun (丁大军)a b, Roeterdink Wim-Ga b, Chen Ji-Gen (陈基根)c, Zeng Si-Liang (曾思良)d e, Liu Xue-Shen (刘学深)a b, Yang Yu-Jun (杨玉军)a b   

  1. a Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China;
    b Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy, Jilin University, Changchun 130012, China;
    c Department of Physics and Materials Engineering, Taizhou University, Taizhou 318000, China;
    d Data Center for High Energy Density Physics, Institute of Applied Physics and Computational Mathematics, Beijing 100088, China;
    e Science and Technology Computational Physics Laboratory, Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
  • Received:2014-10-17 Revised:2014-11-13 Online:2015-04-05 Published:2015-04-05
  • Contact: Yang Yu-Jun E-mail:yangyj@jlu.edu.cn
  • Supported by:

    Project supported by the National Basic Research Program of China (Grant No. 2013CB922200), the National Natural Science Foundation of China (Grants Nos. 11274141, 11034003, 11304116, 11274001, and 11247024), and the Jilin Provincial Research Foundation for Basic Research, China (Grant No. 20140101168JC).

摘要:

Using the time-dependent pseudo-spectral scheme, we solve the time-dependent Schrödinger equation of a hydrogen-like atom in a strong laser field in momentum space. The intensity-resolved photoelectron energy spectrum in above-threshold ionization is obtained and further analyzed. We find that with the increase of the laser intensity, the above-threshold ionization emission spectrum exhibits periodic resonance structure. By analyzing the population of atomic bound states, we find that it is the multi-photon excitation of bound state that leads to the occurrence of this phenomenon, which is in fairly good agreement with the experimental results.

关键词: time-dependent pseudo-spectral scheme, above-threshold ionization, resonance structure

Abstract:

Using the time-dependent pseudo-spectral scheme, we solve the time-dependent Schrödinger equation of a hydrogen-like atom in a strong laser field in momentum space. The intensity-resolved photoelectron energy spectrum in above-threshold ionization is obtained and further analyzed. We find that with the increase of the laser intensity, the above-threshold ionization emission spectrum exhibits periodic resonance structure. By analyzing the population of atomic bound states, we find that it is the multi-photon excitation of bound state that leads to the occurrence of this phenomenon, which is in fairly good agreement with the experimental results.

Key words: time-dependent pseudo-spectral scheme, above-threshold ionization, resonance structure

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

  • 32.80.Rm
42.50.Hz (Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift)