Planar Metamaterials for Antireflection Coating

TL;DR

This paper introduces a novel planar metamaterial-based antireflection coating that significantly reduces reflectance and enhances transmittance over wide angles and narrow bandwidths by engineering wave interference.

Contribution

It presents a new design using split-ring resonators and metal mesh to achieve effective antireflection without needing specific dielectric constants.

Findings

Reduces surface reflectance significantly

Increases transmittance over wide angles

Operates effectively within a narrow bandwidth

Abstract

We present a novel antireflection approach utilizing planar metamaterials on dielectric surfaces. It consists of a split-ring resonator array and a metal mesh separated by a thin dielectric spacer. The coating dramatically reduces the reflectance and greatly enhances the transmittance over a wide range of incidence angles and a narrow bandwidth. Antireflection is achieved by tailoring the magnitude and phase shifts of waves reflected and transmitted at metamaterial boundaries, resulting in a destructive interference in reflection and constructive interference in transmission. The coating can be very thin and there is no requirement for the spacer dielectric constant.