Transparent metamaterials with a negative refractive index determined by spatial dispersion

TL;DR

This paper explores the design of a two-component metamaterial with negative refractive index and spatial dispersion, demonstrating conditions for transparency and reversed phase and group velocities in radio and optical frequencies.

Contribution

It introduces a novel approach to creating transparent negative-index metamaterials with specific spatial dispersion properties, expanding potential applications.

Findings

Existence of a spectral region with transparency

Negative refractive index with opposite phase and group velocities

Conditions for volume fraction ratios

Abstract

The paper considers an opportunity for the creation of an artificial two-component metamaterial with a negative refractive index within the radio and optical frequency band, which possesses a spatial dispersion. It is shown that there exists a spectral region where, under certain ratio of volume fraction unit occupied with components, the metamaterial appears transparent without attenuating the electromagnetic wave passing through it and possessing a phase and group velocity of the opposite sign.