期刊
RESULTS IN PHYSICS
卷 22, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.rinp.2021.103818
关键词
Hyperbolic metamaterials; Black phosphorus; Broadband absorber
资金
- Fujian Provincial Department of Science and Technology [2019H0022]
- Science Fund for Distinguished Young Scholars of Fujian Province [2020J06025]
- Youth Talent Support Program of Jimei University [ZR2019002]
- Innovation Fund for Young Scientists of Xiamen [3502Z20206021]
- Xiamen Marine and Fishery Development Special Fund [20CZB014HJ03]
The study introduces a biaxial hyperbolic metamaterials (HMMs) sawtooth absorber utilizing anisotropic black phosphorus (BP) to achieve high absorption rates, omnidirectionality, and polarization sensitivity. Unlike traditional multilayer metal/dielectric absorbers, the proposed absorber relies on localized surface plasmon resonance for absorption.
We propose a biaxial hyperbolic metamaterials (HMMs) sawtooth absorber using anisotropic black phosphorus (BP) and demonstrate that it can achieve a topological transition from an elliptical dispersion to a hyperbolic dispersion. We also show the material to be an epsilon-near-zero HMM and validate an effective medium theory. Due to BP's anisotropic permittivity and light confinement, our absorber achieves an average absorption of up to 93.4%, omnidirectionality (up to 70 degrees), and polarization sensitivity from 30 to 90 mu m. We gain physical insights about the high absorption using electric field distributions and absorbed power distribution. Unlike the physical mechanism of common multilayer metal/dielectric sawtooth absorbers, which is related to slow-light effect, the absorption of our proposed absorber is attributed to the localized surface plasmon resonance, plasmon polaritons. Our proposed HMM can be applied in the infrared to terahertz region and we conclude by providing practical guidelines for future research on biaxial hyperbolic metamaterials and anisotropic two-dimensional materials.
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