中国物理B ›› 2018, Vol. 27 ›› Issue (5): 58701-058701.doi: 10.1088/1674-1056/27/5/058701

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Theoretical investigation of tunable polarized broadband terahertz radiation from magnetized gas plasma

Xin-Yang Gu(顾新杨), Jin-Song Liu(刘劲松), Zhen-Gang Yang(杨振刚), Sheng-Lie Wang(汪盛烈), Ke-Jia Wang(王可嘉)   

  1. 1 Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China;
    2 School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
  • 收稿日期:2017-11-16 修回日期:2018-02-26 出版日期:2018-05-05 发布日期:2018-05-05
  • 通讯作者: Ke-Jia Wang E-mail:wkjtode@sina.com
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos.11574105,and 61475054) and the Fundamental Research Funds for the Central Universities,China (Grant No.2017KFYXJJ029).

Theoretical investigation of tunable polarized broadband terahertz radiation from magnetized gas plasma

Xin-Yang Gu(顾新杨)1, Jin-Song Liu(刘劲松)1, Zhen-Gang Yang(杨振刚)2, Sheng-Lie Wang(汪盛烈)2, Ke-Jia Wang(王可嘉)1   

  1. 1 Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China;
    2 School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
  • Received:2017-11-16 Revised:2018-02-26 Online:2018-05-05 Published:2018-05-05
  • Contact: Ke-Jia Wang E-mail:wkjtode@sina.com
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos.11574105,and 61475054) and the Fundamental Research Funds for the Central Universities,China (Grant No.2017KFYXJJ029).

摘要:

The mechanism of terahertz (THz) pulse generation with a static magnetic field imposed on a gas plasma is theoretically investigated. The investigation demonstrates that the static magnetic field alters the electron motion during the optical field ionization of gas, leading to a two-dimensional asymmetric acceleration process of the ionized electrons. Simulation results reveal that elliptically or circularly polarized broadband THz radiation can be generated with an external static magnetic field imposed along the propagation direction of the two-color laser. The polarization of the THz radiation can be tuned by the strength of the external static magnetic field.

关键词: terahertz, plasma, magnetic field, polarization

Abstract:

The mechanism of terahertz (THz) pulse generation with a static magnetic field imposed on a gas plasma is theoretically investigated. The investigation demonstrates that the static magnetic field alters the electron motion during the optical field ionization of gas, leading to a two-dimensional asymmetric acceleration process of the ionized electrons. Simulation results reveal that elliptically or circularly polarized broadband THz radiation can be generated with an external static magnetic field imposed along the propagation direction of the two-color laser. The polarization of the THz radiation can be tuned by the strength of the external static magnetic field.

Key words: terahertz, plasma, magnetic field, polarization

中图分类号: 

  • 87.50.U-
52.25.Jm (Ionization of plasmas) 52.38.Fz (Laser-induced magnetic fields in plasmas) 95.30.Gv (Radiation mechanisms; polarization)