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- W3021033653 abstract "In this paper, we propose a broadband tunable metamaterial absorber in the terahertz (THz) region. The absorber comprises a Dirac semimetal film, a dielectric layer, and a gold ground plane. Numerical results show that the absorptivity remains above 90% in the range from 5.7 THz to 8.4 THz when the Fermi level is 65 meV. By varying the Fermi energy of the Dirac semimetal film from 40 meV to 80 meV, the absorption bandwidth and absorption peaks can be dynamically tuned. To explain the mechanism of high absorption, the magnetic field, surface current, and power loss density distributions at different resonant frequencies were presented. Our work may have potential applications in various fields such as sensors, detectors, and photovoltaic devices in THz regions." @default.
- W3021033653 created "2020-05-13" @default.
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- W3021033653 date "2020-05-28" @default.
- W3021033653 modified "2023-10-02" @default.
- W3021033653 title "Broadband dynamically tunable terahertz absorber based on a Dirac semimetal" @default.
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- W3021033653 doi "https://doi.org/10.1364/ao.389828" @default.
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