Chirality-dependent electromagnetically induced transparency based on a double semi-periodic helix metastructure

TL;DR

This paper presents a chiral metastructure with double semi-periodic helices that exhibits chirality-dependent electromagnetically induced transparency and slow light effects in the microwave region, demonstrated through theoretical, numerical, and experimental methods.

Contribution

It introduces a novel chiral metastructure design that enables control of EIT and slow light effects, validated by experiments and numerical analysis.

Findings

Chirality-dependent EIT observed in microwave frequencies.

Experimental results agree with theoretical predictions.

Potential applications in polarization communication and quantum computing.

Abstract

A chiral metastructure composed of spatially separated double semi-periodic helices is proposed and investigated theoretically and experimentally in this Letter. Chirality-dependent electromagnetically induced transparency (EIT) and a slow light effect in the microwave region are observed from a numerical parameter study, while experimental results from the 3D printing sample yield good agreement with the theoretical findings. The studied EIT phenomenon arises as a result of destructive interference by coupled resonances, and the proposed chiral metastructure can be applied in areas such as polarization communication, pump-probe characterization, and quantum computing areas.