太赫兹波斜入射均匀非磁化等离子中传输特性研究
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摘要
目的研究太赫兹波斜入射均匀非磁化等离子体中的传输特性。方法根据分层介质中的电磁波传播理论,给出了等离子中太赫兹波的功率反射和透射系数,分析了太赫兹波频率、入射角、等离子体的碰撞频率和电子密度对太赫兹波传输特性的影响。结果垂直入射时,模型结果与已有文献结果一致;斜入射时,入射角度增大,反射系数增大,透射系数变小。太赫兹波频率增大,反射系数减小,透射系数起初快速增大,而后变得平缓。等离子体的电子密度增大,透射系数减小,碰撞吸收增大,太赫兹波衰减增大。结论入射角变大,反射率增大。太赫兹波频率较低时,入射角对透射率影响明显。
Objective To research transfer characteristics of terahertz(THz) electromagnetic wave propagation in the unmagnetized plasma. Methods According to the theory of electromagnetic wave propagation in layered medium, the TE reflection and transmission coefficients were given. The effects of the incident angle and frequency of terahertz wave as well as collision frequency and electron density of plasma on the reflection and transmission were discussed. Results It was found that there were in good agreement with values of TE reflection and transmission obtained by the existing formulas and proposed models on normal incidence. With the increase of incident angle, the reflection coefficient increased and the transmission coefficient decreased during oblique incidence. With the increase of wave frequency, the reflection coefficient decreased and the transmission coefficient initially increased quickly, and then flattened. With the increase of the electron density, the transmission coefficient decreased, the absorption increased and the THz wave attenuation increased. Conclusion The incident angle increases, the reflectance coefficient becomes bigger. When the terahertz wave frequency is low, the incident angle has obvious influence on the transmission.
Objective To research transfer characteristics of terahertz(THz) electromagnetic wave propagation in the unmagnetized plasma. Methods According to the theory of electromagnetic wave propagation in layered medium, the TE reflection and transmission coefficients were given. The effects of the incident angle and frequency of terahertz wave as well as collision frequency and electron density of plasma on the reflection and transmission were discussed. Results It was found that there were in good agreement with values of TE reflection and transmission obtained by the existing formulas and proposed models on normal incidence. With the increase of incident angle, the reflection coefficient increased and the transmission coefficient decreased during oblique incidence. With the increase of wave frequency, the reflection coefficient decreased and the transmission coefficient initially increased quickly, and then flattened. With the increase of the electron density, the transmission coefficient decreased, the absorption increased and the THz wave attenuation increased. Conclusion The incident angle increases, the reflectance coefficient becomes bigger. When the terahertz wave frequency is low, the incident angle has obvious influence on the transmission.
引文
[1]洪伟,余超,陈继新,等.毫米波与太赫兹技术[J].中国科学:信息科学,2016,46(8):1086-1107.
[2]YU X,JIA S,HU H,et al.160 Gbit/s Photonics Wireless Transmission in the 300~500 GHz Band[J].Apl Photonics,2016,1(8):371-376.
[3]SHI L,GUO B,LIU Y,et al.Characteristic of Plasma Sheath Channel and Its Effect on Communication[J].Progress in Electromagnetics Research,2012,123(3):321-336.
[4]WANG M,LI H,DONG Y,et al.Propagation Matrix Method Study on THz Waves Propagation in a Dusty Plasma Sheath[J].IEEE Transactions on Antennas&Propagation,2015,64(1):286-290.
[5]SONG Z,LIU J,DU Y,et al.The Modeling and Simulation of Plasma Sheath Effect on GNSS System[J].Applied Physics A,2015,121(3):1067-1073.
[6]陈禹旭,赵青,薄勇,等.等离子体鞘层中电磁传输特性的数值仿真和实验验证[J].强激光与粒子束,2015,27(3):290-294.
[7]JIN F Y,TONG H H,SHI Z B,et al.Effects of External Magnetic Field on Propagation of Electromagnetic Wave in Uniform Magnetized Plasma Slabs[J].Computer Physics Communications,2006,175:545-552.
[8]HU B J,WEI G,LAI S L.SMM Analysis of Reflection,Absorption,and Transmission from Nonuniform Magnetized Plasma Slab[J].IEEE Transactions on Plasma Science,1999,27(4):1131-1136.
[9]李江挺,郭立新.等离子体鞘套中的电波传播特性研究[J].电波科学学报,2011,26(3):494-500.
[10]林敏,徐浩军,魏小龙.电磁波在非磁化等离子体中衰减效应的实验研究[J].物理学报,2015,64(5):313-319.
[11]LIU Shao-bin,ZHOU Tao,LIU Mei-lin,et al.WentzelKramer-Brillouin and finite-difference Time-Domain Analysis of Terahertz Band Electromagnetic Characteristics of Target Coated with Unmagnetized Plasma[J].Journal of Systems Engineering and Electronics,2008,19(1):15-20.
[12]陈文波,龚学余,邓贤君,等.THz电磁波在时变非磁化等离子体中的传播特性研究[J].物理学报,2014,63(19):74-79.
[13]YUAN C,ZHOU Z,XIANG X,et al.Propagation Properties of Broadband Terahertz Pulses through a Bounded Magnetized Thermal Plasma[J].Nuclear Inst&Methods in Physics Research B,2011,269(1):23-29.
[14]ZHENG L,ZHAO Q,LIU S Z,et al.Studies of Terahertz Wave Propagation in Non-magnetized Plasma[J].Acta Physica Sinica,2012,61(24):514-518.
[15]TIAN Y,HAN Y P,LING Y J,et al.Propagation of Terahertz Electromagnetic Wave in Plasma with Inhomogeneous Collision Frequency[J].Physics of Plasmas,2014,21(2):1768-1775.
[16]陈春梅,摆玉龙,张洁,等.太赫兹波斜入射到磁化等离子体的数值研究[J].强激光与粒子束,2018,30(1):45-49.
[17]周天翔,陈长兴,蒋金,等.太赫兹波在磁化等离子体中传输特性[J].强激光与粒子束,2016,28(7):97-101.
[18]JAMISON S P,SHEN J,JONES D R,et al.Plasma Characterization with Terahertz Time-domain Measurements[J].Journal of Applied Physics,2003,93(7):4334-4336.
[19]葛德彪,魏兵.电磁波理论[M].北京:科学出版社,2011.
[2]YU X,JIA S,HU H,et al.160 Gbit/s Photonics Wireless Transmission in the 300~500 GHz Band[J].Apl Photonics,2016,1(8):371-376.
[3]SHI L,GUO B,LIU Y,et al.Characteristic of Plasma Sheath Channel and Its Effect on Communication[J].Progress in Electromagnetics Research,2012,123(3):321-336.
[4]WANG M,LI H,DONG Y,et al.Propagation Matrix Method Study on THz Waves Propagation in a Dusty Plasma Sheath[J].IEEE Transactions on Antennas&Propagation,2015,64(1):286-290.
[5]SONG Z,LIU J,DU Y,et al.The Modeling and Simulation of Plasma Sheath Effect on GNSS System[J].Applied Physics A,2015,121(3):1067-1073.
[6]陈禹旭,赵青,薄勇,等.等离子体鞘层中电磁传输特性的数值仿真和实验验证[J].强激光与粒子束,2015,27(3):290-294.
[7]JIN F Y,TONG H H,SHI Z B,et al.Effects of External Magnetic Field on Propagation of Electromagnetic Wave in Uniform Magnetized Plasma Slabs[J].Computer Physics Communications,2006,175:545-552.
[8]HU B J,WEI G,LAI S L.SMM Analysis of Reflection,Absorption,and Transmission from Nonuniform Magnetized Plasma Slab[J].IEEE Transactions on Plasma Science,1999,27(4):1131-1136.
[9]李江挺,郭立新.等离子体鞘套中的电波传播特性研究[J].电波科学学报,2011,26(3):494-500.
[10]林敏,徐浩军,魏小龙.电磁波在非磁化等离子体中衰减效应的实验研究[J].物理学报,2015,64(5):313-319.
[11]LIU Shao-bin,ZHOU Tao,LIU Mei-lin,et al.WentzelKramer-Brillouin and finite-difference Time-Domain Analysis of Terahertz Band Electromagnetic Characteristics of Target Coated with Unmagnetized Plasma[J].Journal of Systems Engineering and Electronics,2008,19(1):15-20.
[12]陈文波,龚学余,邓贤君,等.THz电磁波在时变非磁化等离子体中的传播特性研究[J].物理学报,2014,63(19):74-79.
[13]YUAN C,ZHOU Z,XIANG X,et al.Propagation Properties of Broadband Terahertz Pulses through a Bounded Magnetized Thermal Plasma[J].Nuclear Inst&Methods in Physics Research B,2011,269(1):23-29.
[14]ZHENG L,ZHAO Q,LIU S Z,et al.Studies of Terahertz Wave Propagation in Non-magnetized Plasma[J].Acta Physica Sinica,2012,61(24):514-518.
[15]TIAN Y,HAN Y P,LING Y J,et al.Propagation of Terahertz Electromagnetic Wave in Plasma with Inhomogeneous Collision Frequency[J].Physics of Plasmas,2014,21(2):1768-1775.
[16]陈春梅,摆玉龙,张洁,等.太赫兹波斜入射到磁化等离子体的数值研究[J].强激光与粒子束,2018,30(1):45-49.
[17]周天翔,陈长兴,蒋金,等.太赫兹波在磁化等离子体中传输特性[J].强激光与粒子束,2016,28(7):97-101.
[18]JAMISON S P,SHEN J,JONES D R,et al.Plasma Characterization with Terahertz Time-domain Measurements[J].Journal of Applied Physics,2003,93(7):4334-4336.
[19]葛德彪,魏兵.电磁波理论[M].北京:科学出版社,2011.