Terahertz band-stop filter based on graphene cavity

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 SiO2/Si substrate. To demonstrate the feasibility of the approach, numerical simulation perfo...

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Bibliographic Details
Published in:Micro & nano letters 2018-03, Vol.13 (3), p.374-377
Main Authors: Ze-Jiang, Zhao, Jiu-Sheng, Li
Format: Article
Language:English
Subjects:
Bandstop filters
band‐stop filters
Computer simulation
finite element analysis
Finite element method
Graphene
graphene cavity
graphene devices
Holes
numerical analysis
numerical simulation
Silicon dioxide
Silicon substrates
Terahertz band‐stop filter
Terahertz frequencies
ultra narrow bandstop performances
ultra‐compact bandstop performances
Wave filters
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Summary: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 SiO2/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.
ISSN:1750-0443
1750-0443
DOI:10.1049/mnl.2017.0386