▎ 摘　　要

NOVELTY - Ultra-wideband terahertz absorbing material with double-truncated pyramid structure comprises an absorbing unit, where the absorbing unit comprises a graphene layer (2, 3, 4, 5, 6) and a metal structure (8) set on the graphene layer. The graphene layer is located on the same plane. Multiple absorption units are orderly arranged at intervals from up to down and the size of multiple absorption units is gradually increased from top to bottom in step shape. USE - The material is useful in the broadband communication and radar field. ADVANTAGE - The material: utilizes the combination of the structure of the planar structure and the vertical structure with few layers to realize ultra-broadband terahertz absorption; solves the problems of space limitation of the planar structure and too many vertical structure layers for the ultra-broadband terahertz absorption and combines the graphene layer and the metal layer in low frequency and high frequency absorption, so that the absorption coefficient is greater than 0.26 eV, and the scattering rate preferably 3.3 meV. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for an absorber with the ultra-wideband terahertz absorbing material. DESCRIPTION OF DRAWING(S) - The drawing shows a side view of a double-truncated pyramid-type terahertz absorbing unit structure based on five-layer metal and five-layer graphene in the broadband communication and radar field. First graphene layer (2) Second graphene layer (3) Third graphene layer (4) Fourth graphene layer (5) Metal structure (8)