中国物理B ›› 2018, Vol. 27 ›› Issue (11): 113201-113201.doi: 10.1088/1674-1056/27/11/113201

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇    下一篇

Low-order harmonic generation of hydrogen molecular ion in laser field studied by the two-state model

Ling-Ling Du(杜玲玲), Guo-Li Wang(王国利), Peng-Cheng Li(李鹏程), Xiao-Xin Zhou(周效信)   

  1. College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China
  • 收稿日期:2018-07-18 修回日期:2018-08-27 出版日期:2018-11-05 发布日期:2018-11-05
  • 通讯作者: Ling-Ling Du, Xiao-Xin Zhou E-mail:dull2014@163.com;zhouxx@nwnu.edu.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11465016, 11674268, and 11764038).

Low-order harmonic generation of hydrogen molecular ion in laser field studied by the two-state model

Ling-Ling Du(杜玲玲), Guo-Li Wang(王国利), Peng-Cheng Li(李鹏程), Xiao-Xin Zhou(周效信)   

  1. College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China
  • Received:2018-07-18 Revised:2018-08-27 Online:2018-11-05 Published:2018-11-05
  • Contact: Ling-Ling Du, Xiao-Xin Zhou E-mail:dull2014@163.com;zhouxx@nwnu.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11465016, 11674268, and 11764038).

摘要:

The low-order harmonic generation of hydrogen molecular ion interacting with a linearly polarized laser field has been investigated theoretically by using a simple two-state model. The validity of the two-state model is carefully examined by comparing the harmonic spectra of hydrogen molecular ion obtained from this model with those from the three-dimensional time-dependent Schrödinger equation. When combined with the Morlet transform of quantum time-frequency spectrum, the two-state model can be used to study the dynamical origin of the low-order harmonic generation of hydrogen molecular ion driven by low-frequency pulses. In addition, some interesting structures of the time profiles for low order harmonics are obtained.

关键词: low-order harmonic generation, hydrogen molecule ion, two-state model

Abstract:

The low-order harmonic generation of hydrogen molecular ion interacting with a linearly polarized laser field has been investigated theoretically by using a simple two-state model. The validity of the two-state model is carefully examined by comparing the harmonic spectra of hydrogen molecular ion obtained from this model with those from the three-dimensional time-dependent Schrödinger equation. When combined with the Morlet transform of quantum time-frequency spectrum, the two-state model can be used to study the dynamical origin of the low-order harmonic generation of hydrogen molecular ion driven by low-frequency pulses. In addition, some interesting structures of the time profiles for low order harmonics are obtained.

Key words: low-order harmonic generation, hydrogen molecule ion, two-state model

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

  • 32.80.Rm
42.65.-k (Nonlinear optics)