Open AccessSwitchable multifunctional modulator realized by the stacked graphene-based hyperbolic metamaterial unit cells
Author(s) -
Yu Ma,
Tao Zhang,
Mingyu Mao,
Dan Zhang,
Haifeng Zhang
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.412594
Subject(s) - materials science , metamaterial , optics , reflection (computer programming) , transmission (telecommunications) , wideband , absorption (acoustics) , graphene , dielectric , optoelectronics , total internal reflection , fresnel equations , refractive index , physics , telecommunications , nanotechnology , computer science , programming language
A tunable multifunctional modulator of the stacked graphene-based hyperbolic metamaterial (HM) cells is proposed. The dielectric constant and group index of HM are theoretically investigated. The calculated results show that, for the cell structure, a transmission window in the reflection zone (TWRZ) can be obtained at the normal incidence, but all reflections are converted to the transmission when the incident angle is near 82°. Concurrently, a single frequency absorption in the transmission zone (SFATZ) is realized, which can be adjusted by the chemical potential of graphene. For the whole structure composed of cell structures with different chemical potentials, the ultra-wideband absorption and transmission window in the absorption zone (TWAZ) can be achieved, which can work in different frequency bands if the given structural parameters can be tailored. Those computed results can apply for switchable frequency-dependent and angle-dependent reflection-transmission modulations, single frequency and ultra-wideband absorbers, and a logic switch based on the TWAZ.