Open AccessDesign of broadband and tunable terahertz absorbers based on graphene metasurface: equivalent circuit model approach
Author(s) -
Huang Xianjun,
Zhang Xiao,
Hu Zhirun,
Aqeeli Mohammed,
Alburaikan Abdullah
Publication year - 2015
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2014.0152
Subject(s) - broadband , terahertz radiation , graphene , equivalent circuit , optoelectronics , metamaterial , materials science , terahertz metamaterials , electronic engineering , optics , physics , electrical engineering , engineering , nanotechnology , far infrared laser , voltage , laser
This study presents an effective method to model, analyse and design graphene metasurface‐based terahertz (THz) absorbers using equivalent circuit model approach. Broadband and tunable absorbers consisting of graphene metasurface and metal‐backed dielectric layer have been designed based on the formulas derived from this approach and verified by full‐wave electromagnetic simulation. By properly constructing the graphene metasurface, broadband absorption over 70% fraction bandwidth has been achieved, showing that graphene can provide a wideband absorption in the low THz spectrum. Furthermore, tunability of the graphene metasurface has also been investigated. It is demonstrated that the absorption peak frequencies can be tuned while maintaining the peak absorption unchanged, which is highly desirable for THz sensing applications.