Brewster effect in metafilms composed of bi-anisotropic split-ring resonators

TL;DR

This paper extends the Brewster effect to single-layer metafilms by designing bi-anisotropic split-ring resonators, showing that reflection polarization can be made independent of incident polarization at specific angles through tailored meta-atom radiation patterns.

Contribution

It introduces a novel approach to achieve the Brewster effect in metafilms by controlling meta-atom radiation patterns instead of effective medium parameters.

Findings

Demonstrates polarization-independent reflection at specific angles

Designs bi-anisotropic split-ring resonator metafilms based on theory

Numerical analysis confirms the Brewster effect in the proposed structure

Abstract

The Brewster effect is extended to single-layer metafilms. In contrast to bulk media, the Brewster effect in metafilms can be realized by tailoring the radiation pattern of a distribution of meta-atoms rather than the effective medium parameters. A metafilm composed of bi-anisotropic split-ring resonators is designed based on the theory, and its characteristics are numerically analyzed. The simulation demonstrates that there exists a condition for which the polarization of the reflected wave becomes independent of the incident polarization at a particular angle of incidence.