Chin. Phys. B ›› 2013, Vol. 22 ›› Issue (1): 13101-013101.doi: 10.1088/1674-1056/22/1/013101

• ATOMIC AND MOLECULAR PHYSICS • 上一篇    下一篇

Effect of electron correlation on high-order harmonic generation in helium model atom

胡师林a b, 史庭云a   

  1. a State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China;
    b University of Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2012-04-06 修回日期:2012-05-23 出版日期:2012-12-01 发布日期:2012-12-01
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 10974224) and the National Basic Research Program of China (Grant No. 2010CB832803).

Effect of electron correlation on high-order harmonic generation in helium model atom

Hu Shi-Lin (胡师林)a b, Shi Ting-Yun (史庭云)a   

  1. a State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China;
    b University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2012-04-06 Revised:2012-05-23 Online:2012-12-01 Published:2012-12-01
  • Contact: Shi Ting-Yun E-mail:tyshi@wipm.ac.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 10974224) and the National Basic Research Program of China (Grant No. 2010CB832803).

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摘要： High-order harmonic generation (HHG) of a helium model atom in an intense laser field has been numerically investigated. The influence of electron correlation on HHG is analysed by changing the strength between the electrons. The numerical results show that as the electron interaction strength becomes small, the first ionization energy increases rapidly, which results in the decrease in ionization. So the conversion efficiency of high harmonic lying in the plateau decreases greatly, while the cutoff harmonic order in harmonic spectrum increases.

关键词: electron correlation, high-order harmonic generation, B-spline

Abstract: High-order harmonic generation (HHG) of a helium model atom in an intense laser field has been numerically investigated. The influence of electron correlation on HHG is analysed by changing the strength between the electrons. The numerical results show that as the electron interaction strength becomes small, the first ionization energy increases rapidly, which results in the decrease in ionization. So the conversion efficiency of high harmonic lying in the plateau decreases greatly, while the cutoff harmonic order in harmonic spectrum increases.

Key words: electron correlation, high-order harmonic generation, B-spline

中图分类号:  (Time-dependent phenomena: excitation and relaxation processes, and reaction rates)

  • 31.70.Hq
32.80.Rm (Multiphoton ionization and excitation to highly excited states) 42.65.Ky (Frequency conversion; harmonic generation, including higher-order harmonic generation)