▎ 摘　　要

For investigating broadband perfect absorption in the Terahertz region, a multilayer structure using superimposed Graphene quantum dots with Gaussian distribution radius is proposed. At first, a three-layer metamaterial structure, which is composed of graphene quantum dots at the top layer, dielectric material at the middle layer, and finally gold layer at the bottom is considered and investigated. The radius Gaussian distribution for three radii 400, 450, and 500 nm is considered. Results for the proposed structure including 3, 5, and 7 layers are extracted and compared. Simulation results for the 7-layer case show a broadband absorption range of (4.2 to 8.1 THz), and (4.3 to 8.71 THz) absorption value above 70%. The dielectric material is Si3N4 in the proposed structure.