中国物理B ›› 2019, Vol. 28 ›› Issue (1): 14201-014201.doi: 10.1088/1674-1056/28/1/014201

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Propagation characteristics of oblique incidence terahertz wave through non-uniform plasma

Antao Chen(陈安涛), Haoyu Sun(孙浩宇), Yiping Han(韩一平), Jiajie Wang(汪加洁), Zhiwei Cui(崔志伟)   

  1. School of Physics and Optoelectronic Engineering, Xidian University, Xi'an 710071, China
  • 收稿日期:2018-09-03 修回日期:2018-10-28 出版日期:2019-01-05 发布日期:2019-01-05
  • 通讯作者: Yiping Han, Jiajie Wang E-mail:yphan@xidian.edu.cn;wangjiajie@xidian.edu.cn
  • 基金资助:

    Project supported by the National Basic Research Program of China (Grant No. 2014CB340203), the National Natural Science Foundation of China (Grant Nos. 61431010 and 61501350), and the Natural Science Foundation of Shaanxi Province, China (Grant Nos. 2018JM6016 and 2016JM1001).

Propagation characteristics of oblique incidence terahertz wave through non-uniform plasma

Antao Chen(陈安涛), Haoyu Sun(孙浩宇), Yiping Han(韩一平), Jiajie Wang(汪加洁), Zhiwei Cui(崔志伟)   

  1. School of Physics and Optoelectronic Engineering, Xidian University, Xi'an 710071, China
  • Received:2018-09-03 Revised:2018-10-28 Online:2019-01-05 Published:2019-01-05
  • Contact: Yiping Han, Jiajie Wang E-mail:yphan@xidian.edu.cn;wangjiajie@xidian.edu.cn
  • Supported by:

    Project supported by the National Basic Research Program of China (Grant No. 2014CB340203), the National Natural Science Foundation of China (Grant Nos. 61431010 and 61501350), and the Natural Science Foundation of Shaanxi Province, China (Grant Nos. 2018JM6016 and 2016JM1001).

摘要:

The propagation characteristics of oblique incidence terahertz (THz) waves through non-uniform plasma are investigated by the shift-operator finite-difference time-domain (SO-FDTD) method combined with the phase matching condition. The electron density distribution of the non-uniform plasma is assumed to be in a Gaussian profile. Validation of the present method is performed by comparing the results with those obtained by an analytical method for a homogeneous plasma slab. Then the effects of parameters of THz wave and plasma layer on the propagation properties are analyzed. It is found that the transmission coefficients greatly depend on the incident angle as well as on the thickness of the plasma, while the polarization of the incident wave has little influence on the propagation process in the range of frequency considered in this paper. The results confirm that the THz wave can pass through the plasma sheath effectively under certain conditions, which makes it a potential candidate to overcome the ionization blackout problem.

关键词: terahertz wave, transmission, oblique incidence, plasma sheath, finite-difference time-domain method

Abstract:

The propagation characteristics of oblique incidence terahertz (THz) waves through non-uniform plasma are investigated by the shift-operator finite-difference time-domain (SO-FDTD) method combined with the phase matching condition. The electron density distribution of the non-uniform plasma is assumed to be in a Gaussian profile. Validation of the present method is performed by comparing the results with those obtained by an analytical method for a homogeneous plasma slab. Then the effects of parameters of THz wave and plasma layer on the propagation properties are analyzed. It is found that the transmission coefficients greatly depend on the incident angle as well as on the thickness of the plasma, while the polarization of the incident wave has little influence on the propagation process in the range of frequency considered in this paper. The results confirm that the THz wave can pass through the plasma sheath effectively under certain conditions, which makes it a potential candidate to overcome the ionization blackout problem.

Key words: terahertz wave, transmission, oblique incidence, plasma sheath, finite-difference time-domain method

中图分类号:  (Wave propagation, transmission and absorption)

  • 42.25.Bs
03.50.De (Classical electromagnetism, Maxwell equations) 02.70.Bf (Finite-difference methods)