THz波在不同角度磁化的非均匀磁化等离子体中的传输特性分析

李郝; 杨鑫; 张正平

doi:10.7498/aps.70.20201450

摘要

为利用太赫兹波解决飞行器再入过程遇到的“黑障”问题, 以散射矩阵方法为基础, 分别以非均匀磁化等离子体的磁化方向、电子密度、外加磁场强度和碰撞频率为变量, 研究了垂直入射情形下它们对太赫兹波传输行为的影响. 结果表明: 这些参数对太赫兹波传输性能影响明显, 例如按某一方向改变磁化角度对左极化和右极化太赫兹波的传输功率有相反的影响; 降低磁化强度能一定程度地避开等离子体对右极化波的吸收; 而降低碰撞频率能缩小等离子体对右极化波的吸收频带. 通过调整这些参数, 有望在一定程度上缓解黑障现象.

关键词:

Abstract

When a hypersonic vehicle flies, it will have friction with the atmosphere, ionizing the surrounding air, and producing a plasma sheath containing a large number of free electrons. The plasma sheath will cause the electromagnetic wave to seriously attenuate, which will result in communication interruption and other problems. With the gradual realization of terahertz wave technology, its high penetrability and anti-interference performance provides an important way to solve the blackout problem. Thus, the using of the terahertz wave to solve the blackout problem encountered during vehicle reentry is of great significance to studying the transmission performance of terahertz wave in the plasma sheath. This article refers to the public data of the plasma sheath during the reentry of the RAM vehicle. Considering the asymmetry of the sheath density distribution, a double Gaussian distribution is used to simulate the longitudinal electron density distribution. Based on the SMM algorithm, the article uses the magnetization direction, electron density, external magnetic field strength, collision frequency of the non-uniformly magnetized plasma as variables, and their effects on left-hand and right-hand polarized terahertz wave under normal incidence are studied. The results show that these parameters have obvious effects on the transmission performance of terahertz wave in high-density plasma sheath. The right-hand polarized terahertz wave will produce a power absorption peak near the cyclotron frequency due to cyclotron resonance. Changing the magnetization angle in a certain direction will bring an opposite effect on the transmission rate to left-hand polarized and right-hand polarized terahertz wave. Reducing the magnetization intensity can avoid the absorption peak of the right-hand polarized wave by the plasma to a certain extent. Increasing the magnetization can increase the transmission power of the left-hand polarized wave to a certain extent. Moreover, reducing the collision frequency can narrow the absorption band of the right-hand polarized wave in the plasma and increase the transmission power of left-hand polarized wave. In general, the transmission performance of left-hand polarized terahertz wave in non-uniformly magnetized plasma is better than that of right-hand polarized terahertz wave. These results provide a theoretical basis for investigating the blackout phenomenon. The adjusting of these parameters studied in the article is expected to be able to alleviate the blackout problem to a certain extent.

Keywords:

作者及机构信息

1.
贵州大学大数据与信息工程学院, 贵阳　550025

2.
半导体功率器件可靠性教育部工程研究中心, 贵阳　550025

3.
贵州省微纳电子与软件技术重点实验室, 贵阳　550025

通信作者: 张正平, zpzhang@gzu.edu.cn

基金项目: 半导体功率器件可靠性教育部工程研究中心开放基金(批准号: ERCMEKFJJ2019-(05))、贵州大学自然科学基金(批准号: (2019)62)和贵州省MEMS传感器及系统应用科技创新人才团队(批准号：QKHPTRC[2018]5616）资助的课题

Authors and contacts

1.
College of Big Data and Information Engineering, Guizhou University, Guiyang 550025, China

2.
Semiconductor Power Device Reliability Engineering Research Center of Ministry of Education, Guizhou University, Guiyang 550025, China

3.
Key Laboratory of Micro-Nano-Electronics and Software Technology of Guizhou Province, Guiyang 550025, China

Corresponding author: Zhang Zheng-Ping, zpzhang@gzu.edu.cn

Funds: Project supported by the Open Foundation of Semiconductor Power Device Reliability Engineering Research Center of Ministry of Education, China (Grant No. ERCMEKFJJ2019-(05)), the Natural Science Foundation of Guizhou University, China (Grant No. (2019)62), and MEMS Sensor and System Application Technology Innovation Talent Team of Guizhou Province, China (Grant No. QKHPTRC[2018]5616).

文章全文

参考文献

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施引文献

图 1 太赫兹波在分层等离子体中传播的模型图

Fig. 1. Model diagram of THz waves propagation in the layered plasma.

下载: 全尺寸图片幻灯片

图 2 电子密度分布与等离子体厚度的关系

Fig. 2. Electron density profile versus plasma thickness.

下载: 全尺寸图片幻灯片

图 3 THz波归一化传输功率与外加磁场角度的关系　(a), (b)右极化; (c), (d)左极化

Fig. 3. Relationship between normalized transmission power of THz wave and external magnetic field angle: (a), (b) Right-handed polarization; (c), (d) left-handed polarization.

下载: 全尺寸图片幻灯片

图 4 THz波归一化反射、传输、吸收功率与电子密度最大值的关系　(a), (b), (c)右极化; (d), (e), (f)左极化

Fig. 4. Relationship between normalized reflection, transmission, and absorption power of the THz wave and the maximum value of electron density: (a), (b), (c) Right-handed polarization; (d), (e), (f) left-handed polarization.

下载: 全尺寸图片幻灯片

图 5 THz波归一化传输功率与外加磁场强度的关系　(a), (b)右极化; (c), (d)左极化

Fig. 5. Relationship between normalized transmission power of THz wave and applied magnetic field intensity: (a), (b) Right-handed polarization; (c), (d) left-handed polarization.

下载: 全尺寸图片幻灯片

图 6 THz波归一化传输功率与碰撞频率的关系　(a), (b)右极化; (c), (d)左极化

Fig. 6. Relationship between normalized transmission power of THz wave and collision frequency: (a), (b) Right-handed polarization; (c), (d) left-handed polarization.

下载: 全尺寸图片幻灯片

[1]	Gupta R N, Yos J M, Thompson R A, Lee K P 1990 A Review of Reaction Rates and Thermodynamic and Transport Properties for an 11-species Air Model for Chemical and Thermal Nonequilibrium Calculations to 30000 K (Hampton: Langley Research Center) NASA-RP-1232
[2]	姚博 2019 博士学位论文 (西安: 西安电子科技大学) Yao B 2019 Ph. D. Dissertation (Xi’an: Xidian University) (in Chinese)
[3]	杨楠, 杜海伟 2014 红外与毫米波学报 33 237 Google Scholar Yang N, Du H W 2014 J. Infrared Millimeter Waves 33 237 Google Scholar
[4]	Huang S J, Li F 2004 Int. J. Infrared Millimeter Waves 25 815 Google Scholar
[5]	陈伟, 郭立新, 李江挺, 淡荔 2017 物理学报 66 084102 Google Scholar Chen W, Guo L X, Li J T, Dan L 2017 Acta Phys. Sin. 66 084102 Google Scholar
[6]	Chen W, Guo L X, Li J T, Liu S H 2016 IEEE Trans. Plasma Sci. 44 3235 Google Scholar
[7]	Cheng G X, Liu L 2010 IEEE Trans. Plasma Sci. 38 3109 Google Scholar
[8]	Jazi B, Rahmani Z, Shokri B 2013 IEEE Trans. Plasma Sci. 41 290 Google Scholar
[9]	曹建章, 李景镇, 陈国瑞 2002 电波科学学报 17 125 Google Scholar Cao J Z, Li J Z, Chen G R 2002 Chin. J. Radio Sci. 17 125 Google Scholar
[10]	林敏, 徐浩军, 魏小龙, 梁华, 张艳华 2015 物理学报 64 055201 Google Scholar Lin M, Xu H J, Wei X L, Liang H, Zhang Y H 2015 Acta Phys. Sin. 64 055201 Google Scholar
[11]	Helaly A, Soliman E A, Megahed A A 1997 IEE Proc. MIicrow. Antennas Propag. 144 61 Google Scholar
[12]	Hu B J, Wei G, Lai S L 1999 IEEE Trans. Plasma Sci. 27 1131 Google Scholar
[13]	Chen X, Li K, Liu Y, Zhou Y, Li X, Liu Y 2017 IEEE Trans. Plasma Sci. 45 3166 Google Scholar
[14]	Guo L X, Guo L J 2017 Phys. Plasmas 24 112119 Google Scholar
[15]	Zhang Y Y, Xu G J, Zheng Z Q 2019 Optik 182 618 Google Scholar
[16]	Dunn M G, Kang S W 1973 Theoretical and Experimental Studies of Reentry Plasmas (Washington: National Aeronautics and Space Administration) NASA-CR-2232
[17]	Liu J F, Xi X L, Wang L L 2011 IEEE Trans. Plasma Sci. 39 852 Google Scholar
[18]	Tian Y X, Yan W Z, Gu X L, Jin X L, Li J Q, Li B 2017 AIP Adv. 7 125325 Google Scholar
[19]	Heald M A, Wharton C B, Furth H P 1965 Phys. Today 18 72 Google Scholar
[20]	Yeh C, Rusch W V T 1965 J. Appl. Phys. 36 2302 Google Scholar
[21]	孙朋飞 2019 硕士学位论文 (西安: 西安电子科技大学) Sun P F 2019 M. S. Thesis (Xi’an: Xidian University) (in Chinese)
[22]	薄勇, 赵青, 罗先刚, 刘颖, 陈禹旭, 刘建卫 2016 物理学报 65 035201 Google Scholar Bo Y, Zhao Q, Luo X G, Liu Y, Chen Y X, Liu J W 2016 Acta Phys. Sin. 65 035201 Google Scholar

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THz波在不同角度磁化的非均匀磁化等离子体中的传输特性分析