物理学报2012，Vol.61Issue(24)：373-379,7.
太赫兹波在非磁化等离子体中的传输特性研究
Studies of terahertz wave propagation in non-magnetized plasma
摘要
Abstract
The space crafts, such as spaceship, space shuttle and so on, will face a famous "blackout" problem when they re-enter the earth's atmosphere at high velocity. The plasma sheath severely affects the propagation of the incident electromagnetic wave and causes severe electromagnetic wave attenuation, which results in the communication failures between the space crafts and the ground control center. It is important to study the properties of terahertz wave propagation in non-magnetized plasma, for using the terahertz wave communication is an alternative method to solve the reentry blackout problem. The terahertz wave propagation characteristics in non-magnetized plasma are studied in this paper. The variations of the terahertz wave propagation properties with the terahertz wave frequency, plasma density, plasma collision frequency and the thickness of the plasma are acquired. Some new phenomena are found i.e., there appears periodic oscillation on the reflectivity curve with the increase of terahertz wave frequency, and the period of oscillation is 0.03THz. The oscillation amplitude increases with the increase of terahertz frequency, decreases with the increase of plasma density, and increases with the increase of plasma collision frequency. The oscillation is attributed to the multiple reflections of the electromagnetic wave at the interfaces at z = 0 and z = -d. The terahertz wave propagation properties in plasma are studied experimentally with the shock tube, and the experimental results match well with the theoretical ones. Both the theoretical and experimental results indicate that using terahertz wave communication is an effective way to solve the reentry blackout problem.关键词
等离子体/太赫兹波/非磁化Key words
plasma/terahertz wave/non-magnetized分类
数理科学引用本文复制引用
郑灵,赵青,刘述章,邢晓俊..太赫兹波在非磁化等离子体中的传输特性研究[J].物理学报,2012,61(24):373-379,7.基金项目
国家重点基础研究发展计划（973计划）（批准号：201ICB301805）、国家国际科技合作专项项目（批准号：2011DFA63190）、国家高技术研究发展计划（863计划）（批准号：2011AA7022016）和微细加工光学技术国家重点实验室基金（批准号：M160104012011E11）资助的课题. （）
