Abstract:Broadband and perfect terahertz absorber based on multilayer metamaterial using cross-ring patterned structures is pro-posed and investigated. The structure of the absorber is double absorption layer consisting of a chromium cross ring and eight isosceles right triangles. The unique structure of the double absorbing layers excites the electric dipole multimode resonance, giving rise to high absorption performance. Meanwhile, the influence of construal parameters on absorber be-havior is also discussed. The numerical results shows that the absorption achieves over 90% ranged from 2.45 THz to 6.25 THz and 99% absorption in the range of 3.7 THz-5.3 THz. The realization of broadband and perfect absorber is de-scribed using the impedance matching principle. It obviously found that the absorber is insensitive to the high angle of incidence for both TE and TM polarizations. Compared with the former reports, this absorber has remarkable improved absorption efficiency and smaller period. The terahertz absorber may be found applications in the fields of energy capture and thermal detection.