权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Control of Submillimeter Wave Propagation by Solid Plasma with Various Distribution

不同分布固体等离子体控制亚毫米波传播

基本信息

批准号：
09680452
负责人：
OBUNAI Tetsuo
金额：
$ 0.83万
依托单位：
AKITA UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1999
项目状态：
已结题

项目摘要

Magnetic field dependence of 526 GHz and 671GHz submillimeter wave transmission through a thin p-InSb slab was measured in various values of the ambient temperature, and results were compared with theoretical calculations. It was revealed that, in liquid nitrogen temperature, submillimeter wave attenuation is sufficiently small, and that p-InSb can be used as the dielectric material in a submillimeter wave imageguide. Experimental results also showed a possibility of controlling the submillimeter wave transmission through p-InSb material rapidly by injection of plasma from electrodes. Which indicates a possibility of constructing variable attenuator in the submillimeter range. Magnetic field dependence and temperature dependence of submillimeter was transmission through a two-layer waveguide containing a thin p- and n-InSb slab were also studies. It was shown that the slow-surface wave resonance occurs also in submillimeter wave range as well as in the millimeter wave range, and that a nonreciprocity of over 15 dB was observed. Obtained results were in good agreement with theory. It was also shown that the propagation characteristics in these configurations can be varied by applying a current on the InSb slab. Results of FDTD analysis showed qualitative agreement with the experiments. Propagation characteristics of an imageguide consisting of p-InSb slab were also studied, and it was revealed that the transmission can be varied largely by the injection of plasma.

在不同的环境温度下，测量了526 GHz和671GHz亚毫米波通过p-InSb薄板的磁场依赖性，并与理论计算结果进行了比较。结果表明，在液氮温度下，p-InSb的亚毫米波衰减足够小，可以作为亚毫米波成像波导的介质材料。实验结果还表明，通过从电极注入等离子体，可以快速控制亚毫米波通过p-InSb材料的传输。这表明了在亚毫米范围内构建可变衰减器的可能性。研究了亚毫米波通过含p-和n-InSb薄片的双层波导传输时的磁场依赖性和温度依赖性。结果表明，在亚毫米波和毫米波范围内也存在慢表面波共振，且存在大于15 dB的非互易性。所得结果与理论吻合较好。结果还表明，在这些结构中的传播特性可以通过在InSb板上施加电流来改变。时域有限差分分析结果与实验结果定性一致。研究了由p-InSb板组成的成像波导的传输特性，发现等离子体的注入对其传输特性有很大的影响。