Tunable Flat-Top Bandpass Filter Based on Coupled Resonators on a Graphene Sheet

被引：24
|
作者：
Deng, Haidong [1 ]
Yan, Yuqi [2 ]
Xu, Yi [3 ]
机构：
[1] South China Agr Univ, Coll Sci, Guangzhou 510642, Guangdong, Peoples R China
[2] Guangzhou Univ, Sch Phys & Elect Engn, Guangzhou 510006, Guangdong, Peoples R China
[3] Jinan Univ, Dept Elect Engn, Coll Informat Sci & Technol, Guangzhou 510632, Guangdong, Peoples R China
来源：
IEEE PHOTONICS TECHNOLOGY LETTERS | 2015年 / 27卷 / 11期
基金：
中国国家自然科学基金;
关键词：
Graphene waveguide; flat-top band-pass filter; tunable filter; CONTINUOUS METAL-FILM; LAYER; ABSORPTION; MONOLAYER;
D O I：
10.1109/LPT.2015.2413363
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We propose a graphene filter with a tunable flat-top bandpass response. Such a filter consists of two cascaded graphene resonators embedded in a graphene waveguide. The evanescence coupling between two cavities is crucial to realize the flat and bandpass transmission. We numerically demonstrate that the flat-top passband can be electrically tuned over a wide wavelength range in the midinfrared spectrum with sharper roll-off, flatter tops, and better out-of-band rejection compared with the single resonator case. The proposed device is very compact compared with its working wavelength. It might facilitate the tunable signal process in the midinfrared region utilizing graphene.
引用
收藏
页码：1161 / 1164
页数：4
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