Novel polarization independent and angle consistency absorber based on metal-dielectric metamaterial

Abstract

In this paper, a novel absorber based on metal-dielectric rod is presented. This absorber is consisted of a metal slab and a high permittivity dielectric cross which is composed by two rods vertically. The absorber is polarization independent that the electromagnetic responses always keep the same absorption both for whether the incident wave is horizontally polarized wave (TE wave) or vertically polarized wave (TM wave). The mechanism of the absorption is illustrated by the field distribution. While the incident angle changes from 0 to 65 deg, the absorber shows an excellent performance to keep the absorbance above 90%. We also show the possibility of combing different functions in the same object by using high permittivity dielectric metamaterial.