▎ 摘　　要

NOVELTY - The utility model belongs to terahertz absorber technology field, specifically is a polarization insensitive wideband adjustable terahertz absorber, comprising a plurality of periodically arranged terahertz absorber unit, each terahertz absorber unit comprises a three-layer structure from up to down, respectively for absorbing the terahertz electromagnetic wave of the top layer, a medium layer for enhancing the absorption of the terahertz electromagnetic wave and a bottom layer for reflecting the terahertz electromagnetic wave; the shape of the top layer is a central symmetry pattern, comprising a cross shape located at the central position of the terahertz absorber unit and four quarter discs respectively located at four corners of the terahertz absorber unit. The absorber of the utility model uses a thinner structure to realize the broadband absorption, the central symmetrical pattern makes the structure polarization insensitive, by adjusting the Fermi energy of the graphene, it can realize the adjustment of the absorption intensity.