Dual band metamaterial perfect absorber based on Mie resonances

We numerically and experimentally demonstrated a polarization insensitive dual-band metamaterial perfect absorber working in wide incident angles based on the two magnetic Mie resonances of a single dielectric atom with simple structure. Two absorption bands with simulated absorptivity of 99% and 96%, experimental absorptivity of 97% and 94% at 8.45 and 11.97 GHz were achieved due to the simultaneous magnetic and electric resonances in dielectric atom and copper plate. Mie resonances of dielectric atom provide a simple way to design metamaterial perfect absorbers with high symmetry. Published by AIP Publishing.