High-Q Dual-Band Graphene Absorbers by Selective Excitation of Graphene Plasmon Polaritons: Circuit Model Analysis
arXiv:1906.01886 · doi:10.1016/j.optlastec.2020.106483
Abstract
This article presents the design of two dual-band graphene-based absorbers for terahertz frequencies. The absorbers are composed of two-dimensional (2D)arrays of ribbons and disks printed on a ground plane backed dielectric spacer. The design is based on the excitation of a specific plasmon polariton of the graphene patterned array at each resonance band. An analytical circuit model is used to derive closed-form relations for the geometrical parameters of the absorber and graphene parameters. The graphene patterned array appears as a surface admittance made of an infinite parallel array of series RLC branches. Each branch is equivalent to a graphene plasmon polariton (GPP) providing a distinct resonance mode. The design procedure is based on selectively exciting the first two GPPs. This means that two of the parallel RLC branches are selectively used in the circuit model analysis. The results obtained using the analytical solution are compared with the full-wave simulations in HFSS. The agreement between the results validates the developed design method.
References in corpus (18)
- Ultrahigh electron mobility in suspended graphene
- Boron nitride substrates for high-quality graphene electronics
- Ultrafast graphene photodetector
- Graphene plasmonics: A platform for strong light-matter interaction
- Mid-Infrared Plasmonic Biosensing with Graphene
- An Infrared Spatial and Frequency Selective Metamaterial Perfect Absorber
- A new electromagnetic mode in graphene
- Simple and accurate analytical model of planar grids and high-impedance surfaces comprising metal strips or patches
- On-chip integrated, silicon-graphene plasmonic Schottky photodetector, with high responsivity and avalanche photogain
- Electronically Tunable Perfect Absorption in Graphene
- Effective electro-optical modulation with high extinction ratio by a graphene-silicon microring resonator
- Graphene-plasmon polaritons: From fundamental properties to potential applications
- Quantum Effects in the Nonlinear Response of Graphene Plasmons
- Molecular Sensing with Tunable Graphene Plasmons
- Classical and Quantum Plasmonics in Graphene Nanodisks: the Role of Edge States
- A tunable plasmonic refractive index sensor with nanoring-strip graphene arrays
- Designing Dual-Band Absorbers by Graphene/Metallic Metasurfaces
- Magnetic-field-assisted transmission of THz waves through a graphene layer combined with a periodically perforated metallic film