Graphene-metasurface for wide-incident-angle terahertz absorption
Ri-hui Xiong, Xiaoqing Peng, Jiu‐sheng Li
Abstract
We demonstrate a graphene-metasurface structure for tunable wide-incident-angle terahertz wave absorption, which involves depositing planar arrays of Omega-shaped graphene patterns on a silicon dioxide substrate. We also discuss how the graphene Fermi-level layer and various substrates affect the absorption characteristics. The absorption of the proposed terahertz absorber is above 80% at an incident angle of 0°–60° in frequencies ranging from 0.82 to 2.0 THz. Our results will be very beneficial in the application of terahertz wave communications and biomedical imaging/sensing systems.
Topics & Concepts
Terahertz radiationGrapheneAbsorption (acoustics)Materials scienceOptoelectronicsPlanarSubstrate (aquarium)OpticsFermi levelNanotechnologyPhysicsComputer scienceComputer graphics (images)Composite materialOceanographyElectronGeologyQuantum mechanicsMetamaterials and Metasurfaces ApplicationsPlasmonic and Surface Plasmon ResearchAdvanced Antenna and Metasurface Technologies