Adaptive Multiple-band Absorber Based on VO2 Metasurface

Abstract

The applications of present absorbers encounter the bottleneck of its single-band and static resonance peak. To overcome these obstacles, we proposed a multiple-band absorber out of phase transition material vanadium dioxide (VO2) and demonstrated the switch and modulation of resonances. The proposed VO2 metasurface can excite complex resonances via the top nanoparticle component and Fabry-Perot(FP) resonance via the bottom multilayer component, respectively. And these resonances can be tailored independently by controlling geometrical parameters and switched on and off by varying their temperatures. The physical mechanisms of these resonances are elucidated through an analysis of electromagnetic field distributions. This synergy of multiple resonances on VO2-based metasurface provides a novel and facile way to build adaptive multiple-band absorbers, which may inspire developments in adaptive radiative cooling, thermal management as well as other applications.