▎ 摘　　要

NOVELTY - The utility model claims a double-trapezoid graphene-based broadband terahertz wave absorbing device, belonging to the technical field of terahertz wave absorbing device, using the graphene surface plasmon characteristics. the wave absorbing device is three-dimensional periodic structure, its structure is made of gold of the metal substrate (1), silicon dioxide medium layer (2), and a double-trapezoid graphene layer (3). The utility model mainly through finite element method calculation to simulate graphene to absorption spectrum of the terahertz wave, the wave absorbing device structure optimization to obtain the ideal broadband absorbing effect. The utility model has simple, easy processing; it only can realize absorption efficiency over 90% by superposing two layers of double trapezoidal graphene material wave-absorbing device, and the bandwidth is 1.85 THz.