Aijun Zhu

Abstract Introduction: Non-alcoholic fatty liver disease (NAFLD) is a prevalent chronic liver disorder characterized by dysregulated hepatic lipid metabolism, with a continuously rising global incidence and limited safe and effective therapeutic options.

In this paper, we propose a polarization-insensitive and ultra-bandwidth terahertz metamaterial absorber based on vanadium dioxide. The absorber consists of a vanadium dioxide (${{\rm VO}_2}$) resonant layer, a photonic crystal slab dielectric layer, and a metallic reflection layer.

A terahertz metamaterial device based on plasma-induced transparency (PIT) and phase-change material (PCM), for the first time, to our knowledge, is proposed, which can achieve a 2–4 decoding function and a 2-bit encoding function. By changing the temperature of the ${{\rm VO}_2}$ and adjusting the Fermi level of the graphene, a terahertz micro-nano device with polarization characteristics and the PIT effect is actively switched.