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近年来,随着太赫兹(THz)时域光谱系统的发展,THz波导作为用于THz波传输的器件一直都是研究的重点,而寻找低损耗的材料和可弯曲的结构一直是研究人员的目标。介绍了THz时域光谱系统的现状,并总结了传统波导技术应用于THz领域时的一些不足之处。重点介绍了基于三种不同工作原理的新型THz波导,并对比了各自的优缺点,这三种原理分别是金属面反射、介质界面全反射以及反共振反射。最后简要介绍了可弯曲低损耗THz波导的应用现状及后续工作方向。
In recent years, with the development of THz time-domain spectroscopy systems, THz waveguides have been the focus of research for devices used for THz wave transmission, and it has always been the researchers looking for low loss materials and bendable structures aims. The current status of the THz time-domain spectroscopy system is introduced, and some shortcomings of the traditional waveguide technology in the field of THz are summarized. The new THz waveguides based on three different working principles are mainly introduced and their advantages and disadvantages are compared. The three principles are metal surface reflection, total reflection at the interface of the medium and anti-resonance reflection. Finally, the application status of flexible low loss THz waveguide and its follow-up work direction are briefly introduced.