基于双层金属孔阵列的太赫兹宽带滤波器的设计与实验验证

Design and experimental verification of terahertz wideband filter based on double-layered metal hole arrays.

作者信息

Rao Lei, Yang Dongxiao, Zhang Le, Li Tao, Xia Song

机构信息

Department of Information Science & Electronic Engineering, Zhejiang University, Hangzhou 310027, China.

出版信息

Appl Opt. 2012 Mar 1;51(7):912-6. doi: 10.1364/AO.51.000912.

DOI:10.1364/AO.51.000912

PMID:22410895

Abstract

A terahertz wideband filter based on double layer metal hole arrays is designed in this paper. A metal hole array is perforated on a metal layer with a square array of circular air holes. The transmission characteristics of the electromagnetic waves through the metal hole array can be determined by the accumulation of in-phase scattering, spoof surface plasmon polaritons, and waveguide modes. The transmission spectrum is tuned by adding another identical layer metal hole array, and a wideband filter can be formed accordingly. Samples containing double-layered metal hole arrays were fabricated by micromachining technology. A wideband filter with center frequency located at 0.8 THz and FWHM reaching 400 GHz was experimentally achieved.

摘要

本文设计了一种基于双层金属孔阵列的太赫兹宽带滤波器。在具有圆形气孔方形阵列的金属层上打孔形成金属孔阵列。电磁波通过金属孔阵列的传输特性可由同相散射、类表面等离激元极化子和波导模式的叠加来确定。通过添加另一层相同的金属孔阵列来调谐传输谱，从而形成宽带滤波器。采用微加工技术制作了包含双层金属孔阵列的样品。实验实现了中心频率位于0.8太赫兹、半高宽达到400吉赫兹的宽带滤波器。