利用太赫兹时域光谱系统对三种反谐振波导的太赫兹谱进行了研究, 这三种波导分别是PMMA管型波导, PMMA自支撑结构波导和SiO2管型波导.该研究验证了三种波导的太赫兹传输基于反谐振理论, 并在实验上实现了PMMA自支撑结构波导超过2 THz的宽光谱传输.同时, 对基于反谐振原理的太赫兹物质传感进行了理论和实验分析, 为物质探测提供了一种可行的手段.

A broadband spectroscopy of anti-resonant waveguides in the terahertz region was investigated. The broadband spectral transmission properties of a poly(methylmethacrylate) (PMMA) pipe waveguide, a PMMA self-supporting waveguide, and a SiO2 pipe waveguide were studied using terahertz time domain spectroscopy (THz-TDS). The existence of the anti-resonance phenomenon was demonstrated. Additionally, the PMMA self-supporting waveguide has been experimentally shown to realize transmission bandwidth of over 2 THz without dip frequencies. Also, based on the anti-resonance mechanism, the dielectric pipe waveguide was successfully used as a terahertz refractive index sensor for liquid sensing, which offers a possible method for materials detection.