光电工程, 2020, 47 (5): 190075, 网络出版: 2020-05-27
等离子体中太赫兹波传输及成像探测特性研究
Terahertz wave propagation and imaging detection characteristics in plasma
摘要
本文根据散射矩阵方法模拟等离子体并建立了非均匀等离子体理论模型,并在此基础上计算了0.1 THz~10 THz频段的全波段太赫兹波在其中的传输特性。根据介质阻挡放电原理在实验室环境下搭建等离子体射流产生装置并产生非均匀等离子体,进行了太赫兹时域光谱(THz-TDS)以及宽带太赫兹源在等离子体中的透射光谱测量以及太赫兹波对等离子体遮挡下目标物的反射成像的试验。理论和实验结果均表明,较高频太赫兹波在等离子体中有良好的穿透性,这为太赫兹波在黑障区的通信以及雷达探测应用打下研究基础。
Abstract
In this paper, the theoretical model of ununiform plasma sheath is established based on scattering matrix method and the transmission characteristics of 0.1 THz~10 THz wave are simulated. A kind of plasma jet is produced in laboratory environment according to the principle of dielectric barrier discharge. Then the measurement of transmission spectrum of terahertz time-domain spectroscopy (THz-TDS), broadband terahertz source, and the terahertz wave reflective imaging of target under plasma shelter are carried out, respectively. Both theory and experiment results show that terahertz wave has good penetration in plasma, which provides a new way for communication and radar detection in blackout area.
耿兴宁, 李吉宁, 徐德刚, 刘畅, 范小礼, 姚建铨. 等离子体中太赫兹波传输及成像探测特性研究[J]. 光电工程, 2020, 47(5): 190075. Geng Xingning, Li Jining, Xu Degang, Liu Chang, Fan Xiaoli, Yao Jianquan. Terahertz wave propagation and imaging detection characteristics in plasma[J]. Opto-Electronic Engineering, 2020, 47(5): 190075.