High degree simplification and tunable absorption features of terahertz metamaterial absorber

Abstract

This work demonstrated to attain a multiband absorption in the terahertz region with high degree simplification and tunable absorption characteristics. The design model composed of an H-type resonator placed above on a middle layer (dielectric medium) and a metallic layer at the bottom. The single sized resonator strongly interacts with incident electromagnetic wave resulting four near perfect absorption peaks located at 0.625 THz, 1.85 THz, 2.075 THz, and 2.5 THz. Moreover, the suggested design was also investigated for active modulation features by inserting vanadium dioxide (VO2) material into the design metamaterial structure due to which the quad-band absorption profile exhibits a switchable function by variation in the state phase of VO2 from insulator to metallic phase. Therefore, the design structure could have wide range of potential THz technology related field applications.