红外与毫米波学报, 2019, 38 (1): 68, 网络出版: 2019-03-19   

低损耗太赫兹波导及其成像应用

Low-loss terahertz waveguide and its imaging application
作者单位
1 南开大学 现代光学研究所, 天津 300350
2 天津市交通运输工程质量安全监督总站, 天津 300384
摘要
高性能的太赫兹功能器件在太赫兹波的产生、传输及探测上都有着重要意义.报道了一种Kagome型低损耗太赫兹波导及其成像应用.首先根据反谐振波导理论设计了0.1 THz处低损耗的太赫兹波导, 其理论损耗低至0012 cm-1.然后使用3D打印技术制备波导实物, 实验测得其损耗为0.0153 cm-1, 波导末端光束发散角为6±05°.最后基于该波导搭建了可重构太赫兹成像装置, 分别实现了对隐藏刀片、矿石的反射和透射成像, 在地下远距离勘探领域具有潜在的应用前景.
Abstract
High-performance terahertz functional devices have great significance in the generation, transmission and detection of terahertz waves. This paper reports a Kagome-type low-loss terahertz waveguide and its imaging applications. Firstly, anti-resonant waveguide theory was used to design a Kagome terahertz waveguide with low loss transmission at 0.1 THz, which has a theoretical loss as low as 0.012 cm-1. Secondly, the waveguide was fabricated by 3D printing technology. The experimental loss is 0.0153 cm-1, and the beam divergence angle at the end of the waveguide is about 6±0.5 degree. Finally, a reconfigurable terahertz imaging system was set up based on the waveguide, which realizes reflection and transmission imaging for a hidden blade and ore respectively. This technology has great application prospects in the underground long-distance exploration.

李帅, 戴子杰, 高翔, 占涛, 赵得龙, 龚诚, 刘伟伟. 低损耗太赫兹波导及其成像应用[J]. 红外与毫米波学报, 2019, 38(1): 68. LI Shuai, DAI Zi-Jie, GAO Xiang, ZHAN Tao, ZHAO De-Long, GONG Cheng, LIU Wei-Wei. Low-loss terahertz waveguide and its imaging application[J]. Journal of Infrared and Millimeter Waves, 2019, 38(1): 68.

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