The basic propagation properties of the silica and silicon subwavelength-diameter hollow wire waveguides have been investigated by comparison. It shows that the silica and silicon subwavelength-diameter hollow wire waveguides have some interesting properties, such as enhanced evanescent field in the cladding, enhanced intensity in the hollow core, and large waveguide dispersion. For the different confinement ability, the enhanced field in the hollow core and cladding of the silica subwavelength-

由于亚波长人工材料具有许多特殊的光学性质，目前，利用这些性质在微波波段设计出了多种功能器件。但是，太赫兹波段亚波长材料的尺寸较小以及太赫兹源和探测器的限制，太赫兹功能器件的制作与应用受到了一定制约。为了实现太赫兹滤波，利用时域有限差分（FDTD）方法研究了太赫兹亚波长金属条阵列结构的太赫兹透射性质，结果发现，一个单胞内包含多个金属条的周期结构其太赫兹透射谱中可以出现多个吸收峰，从而可以实现多频段太赫兹滤波。另外，通过改变金属条的结构可以使吸收峰加宽，从而加大了太赫兹滤波范围，最终设计出了宽吸收带的太赫兹滤波器件。