Abstract:
Broadband absorption performance in resistive metamaterial absorber (MA) has always been disturbed by its element of ohmic sheet. To enhance the stable absorption performance, a comprehensive scheme based on the integration of resistive MA and plasmonic structure (PS) is proposed in this paper. Theoretical investigation shows that the multi-resonance can be inspired by the PS based on dispersion engineering, and the localized electric field takes effect on the surface of ohmic sheet accordingly. Simulation and experimental measurement show that the proposed resistive plasmonic absorbing structures (PAS) can achieve stable and highly efficient absorption with the efficiency during the broad frequency band from 7.8 to 40.0GHz with the ohmic sheet ranging from 100 to 250Ω/sq. On illumination, the attempt provides an efficient path to the comprehensive performance optimization based on the integration scheme of PS and MA, enabling a wide range of applications.