title: Graphene metascreen for designing compact infrared absorbers with enhanced bandwidth.
abstract: We propose a compact, wideband terahertz and infrared absorber, comprising a patterned graphene sheet on a thin metal-backed dielectric slab. This graphene-based nanostructure can achieve a low or negative effective permeability, necessary for realizing the perfect absorption. The dual-reactive property found in both the plasmonic graphene sheet and the grounded high-permittivity slab introduces extra poles into the equivalent circuit model of the system, thereby resulting in a dual-band or broadband magnetic resonance that enhances the absorption bandwidth. More interestingly, the two-dimensional patterned graphene sheet significantly simplifies the design and fabrication processes for achieving resonant magnetic response, and allows the frequency-reconfigurable operation via electrostatic gating.
authors.affiliation: Department of Electrical and Computer Engineering, Wayne State University, Detroit, MI 48202, USA.
authors.forename: Pai-Yen
authors.initials: PY
authors.lastname: Chen
authors.forename: Mohamed
authors.initials: M
authors.lastname: Farhat
authors.forename: Hakan
authors.initials: H
authors.lastname: Bağcı