Bianisotropic route to the realization and matching of backward-wave metamaterial slabs

TL;DR

This paper proposes a novel bianisotropic composite medium design for backward-wave metamaterials, which is easier to realize in optics and offers potential for improved matching to free space.

Contribution

It introduces a new concept of using uniaxial bianisotropic structures embedded in negative permittivity media for backward-wave metamaterials.

Findings

Analytical study of microwave Omega-composite with wire lattice

Demonstrates potential for optical backward-wave metamaterials

Provides a method for better matching to free space

Abstract

A concept of backward-wave bianisotropic composite medium matched to free space is suggested. It is based on the use of a uniaxial bianisotropic structure embedded into a matrix with negative effective permittivity. Since bianisotropy is easier to achieve in the optical range than artificial magnetism, this concept is prospective for optical backward-wave metamaterials. As an example of possible realizations, a microwave Omega-composite combined with a wire lattice is analytically studied.