Ferraro Antonio, Zografopoulos Dimitrios C, Caputo Roberto, Beccherelli Romeo
Consiglio Nazionale delle Ricerche, Istituto per la Microelettronica e Microsistemi (CNR-IMM), Rome, 00133, Italy.
Department of Physics, University of Calabria, I-87036, Rende, (CS), Italy.
Sci Rep. 2018 Nov 22;8(1):17272. doi: 10.1038/s41598-018-35515-z.
We experimentally and theoretically demonstrate a class of narrowband transmissive filters in the terahertz spectrum. Their operation is based on the excitation of guided-mode resonances in thin films of the low-loss cyclo-olefin polymer Zeonor, upon which aluminum stripe and patch arrays are patterned via standard photolithography. The filters are engineered to operate in low atmospheric loss THz spectral windows, they exhibit very high transmittance and quality factors, compact thickness, and mechanical stability. The dependence of their filtering properties on the geometrical parameters, the substrate thickness and the angle of incidence is investigated, discussing the physical limitations in their performance. This class of filters provides a cost-effective solution for broadband source or channel filtering in view of emerging terahertz wireless communication systems.
我们通过实验和理论证明了一类太赫兹光谱中的窄带透射滤波器。它们的工作基于低损耗环烯烃聚合物Zeonor薄膜中导模共振的激发，在该薄膜上通过标准光刻技术制作铝条纹和贴片阵列。这些滤波器设计用于在低大气损耗的太赫兹光谱窗口中运行，具有非常高的透射率和品质因数、紧凑的厚度以及机械稳定性。研究了它们的滤波特性对几何参数、衬底厚度和入射角的依赖性，并讨论了其性能的物理限制。鉴于新兴的太赫兹无线通信系统，这类滤波器为宽带源或信道滤波提供了一种经济高效的解决方案。
