Backward-wave regime and negative refraction in chiral composites

TL;DR

This paper explores how chiral composites with resonant interactions can exhibit negative refraction and backward-wave regimes, potentially enabling superlenses in the optical spectrum.

Contribution

It demonstrates the possibility of negative refraction in chiral composites due to resonant interactions, highlighting a new approach for optical superlenses.

Findings

Strong resonant interaction causes a stop band in frequency.

Negative refraction occurs near the resonant frequency of chiral particles.

Resonant chiral composites could enable optical negative refraction and superlenses.

Abstract

Possibilities to realize a negative refraction in chiral composites in in dual-phase mixtures of chiral and dipole particles is studied. It is shown that because of strong resonant interaction between chiral particles (helixes) and dipoles, there is a stop band in the frequency area where the backward-wave regime is expected. The negative refraction can occur near the resonant frequency of chiral particles. Resonant chiral composites may offer a root to realization of negative-refraction effect and superlenses in the optical region.