中国物理B ›› 2017, Vol. 26 ›› Issue (10): 103302-103302.doi: 10.1088/1674-1056/26/10/103302

• ATOMIC AND MOLECULAR PHYSICS • 上一篇    下一篇

Influence of the initial electronic state on minima of high-order harmonic spectrum radiated from hydrogen molecular ion

Hui-Fang Cui(崔会芳), Xiang-Yang Miao(苗向阳)   

  1. College of Physics and Information Engineering, Shanxi Normal University, Linfen 041004, China
  • 收稿日期:2017-05-09 修回日期:2017-06-12 出版日期:2017-10-05 发布日期:2017-10-05
  • 通讯作者: Xiang-Yang Miao E-mail:sxxymiao@126.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 11404204) and the Program for the Top Young Academic Leaders of Higher Learning Institutions of Shanxi Province, China.

Influence of the initial electronic state on minima of high-order harmonic spectrum radiated from hydrogen molecular ion

Hui-Fang Cui(崔会芳), Xiang-Yang Miao(苗向阳)   

  1. College of Physics and Information Engineering, Shanxi Normal University, Linfen 041004, China
  • Received:2017-05-09 Revised:2017-06-12 Online:2017-10-05 Published:2017-10-05
  • Contact: Xiang-Yang Miao E-mail:sxxymiao@126.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11404204) and the Program for the Top Young Academic Leaders of Higher Learning Institutions of Shanxi Province, China.

摘要: We theoretically investigate the high-order harmonic generation of the one-dimensional hydrogen molecular ion at fixed intermediate internuclear distance, driven by a multicycle laser field. Our results show that the initial electronic state of the hydrogen molecular ion affects the modulation of the high-order harmonic spectrum, especially the positions of the minima. Based on the two-state model, the underlying physical mechanism of the minimum is analyzed and discussed. Further analysis shows that the different positions of the minima in the different initial electronic states can be understood via the different interferences of the two phase-adiabatic states at the ionization times.

关键词: the minima of the high-order harmonic spectrum, interference, phase-adiabatic states

Abstract: We theoretically investigate the high-order harmonic generation of the one-dimensional hydrogen molecular ion at fixed intermediate internuclear distance, driven by a multicycle laser field. Our results show that the initial electronic state of the hydrogen molecular ion affects the modulation of the high-order harmonic spectrum, especially the positions of the minima. Based on the two-state model, the underlying physical mechanism of the minimum is analyzed and discussed. Further analysis shows that the different positions of the minima in the different initial electronic states can be understood via the different interferences of the two phase-adiabatic states at the ionization times.

Key words: the minima of the high-order harmonic spectrum, interference, phase-adiabatic states

中图分类号:  (Multiphoton ionization and excitation to highly excited states (e.g., Rydberg states))

  • 33.80.Rv
42.65.Re (Ultrafast processes; optical pulse generation and pulse compression) 42.25.Hz (Interference)