Super/Zero Scattering Characteristics of Circular SRR Arrays

Abstract

Abstract-The ability to control the scattering property of an object is important in many applications. In this paper, we propose and study the scattering characteristics of a circular array of split-ring resonators (SRRs). By calculating the scattered energy spectrum, we show that the proposed structure has a localized surface plasmon resonance like behavior, which makes it useful as a super scatterer. Furthermore, in a special case, the proposed structure exhibits transparency to the illuminated waves, i.e., it does not scatter any energy at all and thus acts as a zero electromagnetic scattering object.

Monostatic superscattering in cylindrical structures

“…In [1], it has been shown, that a conducting cylinder coated with a DNG (Double Negative) material made of a dielectric substrate with helical strips on its external face, achieves a larger monostatic RCS than the PEC cylinder with an equal radius. In [2], the authors propose a cylindrical structure made of SRRs (Split Ring Resonators), resulting in a very high resonant scattering object. The definition of a superscatterer first appeared in [3], where by using the transformation optics it has been shown that a coating with both anisotropic permeability and permittivity is needed for a PEC 2D cylinder to obtain a high monostatic RCS.…”