Open AccessTerahertz band‐stop filter based on graphene cavity
Author(s) -
ZeJiang Zhao,
JiuSheng Li
Publication year - 2018
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2017.0386
Subject(s) - terahertz radiation , graphene , band stop filter , materials science , filter (signal processing) , optoelectronics , optics , physics , low pass filter , nanotechnology , electrical engineering , engineering
In order to obtain ultra‐compact and ultra‐narrow bandstop performances, the work presents a terahertz filter based on graphene cavities, which consists of four graphene cavities and a graphene waveguide on SiO 2 /Si substrate. To demonstrate the feasibility of the approach, numerical simulation performed with the aid of the finite‐element method is used to evaluate the terahertz performance of the proposed device. The structure rejects the signals at the frequencies from 5.9978 to 6.002 THz with >20 dB suppression. The high‐Q band‐rejection terahertz wave filter with four graphene cavities provides of 1500. The dimensions of the presented terahertz wave band‐stop filter are of 22.5 μm × 18.0 μm. The high‐performance, compact‐size, and low‐cost filter is designed for reducing the interference in future terahertz systems.