Open AccessGraphene patterns supported terahertz tunable plasmon induced transparency
Author(s) -
Xiaoyong He,
Feng Liu,
Fangting Lin,
Wangzhou Shi
Publication year - 2018
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.009931
Subject(s) - plasmon , terahertz radiation , graphene , fano resonance , fermi level , fermi energy , figure of merit , amplitude modulation , optoelectronics , optics , materials science , amplitude , surface plasmon polariton , modulation (music) , antenna (radio) , coupling (piping) , physics , frequency modulation , surface plasmon , telecommunications , nanotechnology , radio frequency , electron , quantum mechanics , computer science , acoustics , metallurgy
The tunable plasmonic induced transparency has been theoretically investigated based on graphene patterns/SiO 2 /Si/polymer multilayer structure in the terahertz regime, including the effects of graphene Fermi level, structural parameters and operation frequency. The results manifest that obvious Fano peak can be observed and efficiently modulated because of the strong coupling between incident light and graphene pattern structures. As Fermi level increases, the peak amplitude of Fano resonance increases, and the resonant peak position shifts to high frequency. The amplitude modulation depth of Fano curves is about 40% on condition that the Fermi level changes in the scope of 0.2-1.0 eV. With the distance between cut wire and double semi-circular patterns increases, the peak amplitude and figure of merit increases. The results are very helpful to develop novel graphene plasmonic devices (e.g. sensors, modulators, and antenna) and find potential applications in the fields of biomedical sensing and wireless communications.