Dynamically Babinet-invertible metasurface: a capacitive-inductive reconfigurable filter for terahertz waves using vanadium-dioxide metal-insulator transition

摘要

This paper proposes a reconfigurable planar metamaterial that can be switchedbetween capacitive and inductive responses using local changes in theelectrical conductivity of its constituent material. The proposed device isbased on Babinet's principle and exploits the singular electromagneticresponses of metallic checkerboard structures, which are dependent on the localelectrical conductivity. Utilizing the heating-induced metal-insulatortransition of vanadium dioxide ($\mathrm{VO}_2$), the proposed metamaterial isdesigned to compensate for the effect of the substrate and is experimentallycharacterized in the terahertz regime. This reconfigurable metamaterial can beutilized as a switchable filter and as a switchable phase shifter for terahertzwaves.