Fabrication of Metamaterial Absorbers in THz Region and Evaluation of the Absorption Characteristics

SUMMARY Metamaterial absorbers with various sizes were experimentally demonstrated in the terahertz frequency region, and their absorption characteristics were evaluated. They consist of an Au ground plate, a polyimide layer, and Au metamaterial structures. Two types of metamaterial absorbers with crossed shapes and cut‐wire shapes were fabricated, respectively. For both types of metamaterials absorbers, 90% of absorption was experimentally obtained around 1.5 THz frequencies.