An active controllable wide-angle and ultra-wideband terahertz absorber/reflector based on VO₂ metamaterial

Abstract

The use of metamaterials in the design of optics is an important strategy for controlling light fields. Numerous terahertz metamaterial devices have been recently designed; however, their performance is relatively...

Design of an ultra-wideband and switchable VO2-based microwave absorber

“…Therefore, Vanadium dioxide (VO 2 ), a phase change material, suffers a fast response, large modulation depth, and multiple modulation methods [29], as well as a low phase change temperature of 68° [30] is widely used for the design of metamaterial device with the switchable functionalities. However, most of these studies have successfully designed switchable terahertz broadband MA structures [31][32][33][34][35][36][37][38][39][40][41], but very few investigations of switchable MAs using VO 2 for microwave regions have been reported so far [42]. Hence, many efforts have been explored to design a switchable microwave MA structure having both large bandwidth and high absorption performance as recently reported [42,43].…”