期刊
NANOTECHNOLOGY
卷 26, 期 16, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/26/16/164002
关键词
graphene plasmonics; perfect absorbers of light; metaferrite; metamaterials
资金
- King Abdulaziz City for Science and Technology's TIC (Technology Innovation Center) for Solid-state Lighting at KAUST
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 highpermittivity 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.
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