Abstract
Two-dimensional metallic multi-band metamaterial absorber is simulated and experimentally studied. High performance absorption properties are obtained: a broad absorption band and two narrow absorption peaks. Localized surface plasmon (LSP) mode and dielectric loss mode result in these absorption bands. The absorption performance can be improved through optimizing the radius of metallic disks. A LC equivalent circuit model is applied to understand the electric-coupling effect between metallic disks. Measured results indicate that the multi-band metamaterial absorber reveals wide-angle performance. Finally, the refractive index of the dielectric layer is optimized to achieve maximum absorption in simulation.
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