Different open resonant ring structures with substrate of polyimide were designed. The transmission characteristics of the structures for terahertz wave were investigated by simulation and experiment. The results show that the transmission peak of the structures moves to high frequency with increase of thickness of the metal layer. With increase of substrate thickness, the transmission peak moved to low frequency and the transmissivity decreased. The influence of number of “C” shape open resonant rings in the unit structure on the transmission characteristics of terahertz wave was also studied. It is found that when the number of “C” shape open resonant rings increases from one to two, more transmission peaks appeared in the frequency of 0.2–2 THz. The transmissivity of the designed structures was tested by terahertz time-domain spectrometer (THz-TDS). The experimental results showed good agreement to the simulation results.

中文翻译：

---

基于周期金属开谐振环结构的太赫兹波传输特性的仿真和实验研究

设计了具有聚酰亚胺衬底的不同的开放式共振环结构。通过仿真和实验研究了太赫兹波结构的传输特性。结果表明，随着金属层厚度的增加，结构的透射峰向高频移动。随着基板厚度的增加，透射峰移至低频，透射率降低。还研究了单元结构中“ C”形开放谐振环的数量对太赫兹波传输特性的影响。发现当“ C”形开放共振环的数量从一增加到两个时，在0.2-2 THz的频率中出现了更多的传输峰。设计的结构的透射率通过太赫兹时域光谱仪（THz-TDS）进行测试。实验结果与仿真结果吻合良好。