在实验上提出将九个开口谐振环以第一个谐振环的开口方向为基准按照涡旋状的轨迹排布, 且依次将开口环逆时针扭转40°, 构成九聚物太赫兹超材料, 并在理论上系统研究了该超材料的传输特性。将原本只具有单一谐振模式的开口谐振环按照类似于低聚物的结构排布方式构成周期单元结构时, 利用结构末端引起的能量耦合来增强相邻谐振器间的能量耦合, 便会有更多的谐振模式产生, 最终实现偏振不敏感的效果。这种思路丰富了传统超材料离散结构的设计理念, 为太赫兹超材料功能器件, 如开关, 调制器和滤波器等的设计提供了一种新的参考方案。

A nonamer metamaterial composed of nine split ring resonators with different orientations was experimentally and numerically researched in terahertz band. The nine split rings were arranged spirally. From the first split ring, the subsequent split rings were rotated anti-clockwise by 40°. Generally, the split ring resonator was polarization-dependent. It was found that split rings oligomer, which can produce multiple resonance modes, was polarization-independent owing to the near-field energy coupling. The split rings oligomer composed of polarization-dependent resonators exhibited a polarization-independent effect, which enriched the design idea of traditionally uncoupled metamaterial composed of disperse resonators, and induced a new path for terahertz functional devices, like optical switch, modulator, filter and so on.