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Abstract
A non-metallic metasurface absorber containing ${\text{VO}_2}$, InSb, and Teflon has been designed, simulated, and investigated for normally incident plane waves in the terahertz spectral regime. When the temperature exceeds 72°C, a backing layer of ${\text{VO}_2}$ in its rutile phase instead of a conventional metal virtually eliminates transmission. Peak absorptance as high as 0.998, quality factor on the order of 200, and magnetostatic tunability of about $16 \;{\text{GHz\, T}^{- 1}}$ are achievable. Such metasurfaces can be made using standard microfabrication techniques.
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