Adaptive Multiple-band Absorber Based on VO2 Metasurface

Siyi Ma1

Desong Fan1*Email

1MIIT Key Laboratory of Thermal Control of Electronic Equipment, School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu, 210094, China.

Abstract

The applications of present absorbers encounter the bottleneck of its single-band and static resonance peak. To overcome these obstacles, we propose a multiple-band absorber out of phase transition material VO2, and demonstrate the switch and modulation of resonances. The proposed VO2 metasurface, can excite complex resonances via the top nanoparticle component and 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 its 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.