Planar designs for electromagnetically induced transparency in metamaterials

TL;DR

This paper introduces a planar metamaterial design that demonstrates electromagnetically induced transparency in the microwave band, enabling slow light applications with low losses at room temperature.

Contribution

It presents a novel planar design coupling a split-ring resonator with a cut-wire, facilitating experimental verification and tunability of the transparency window.

Findings

Transmission window sensitive to coupling strength and resonator parameters

Design achieves low losses and small group velocity

Suitable for room-temperature slow light applications

Abstract

We present a planar design of a metamaterial exhibiting electromagnetically induced transparency that is amenable to experimental verification in the microwave frequency band. The design is based on the coupling of a split-ring resonator with a cut-wire in the same plane. We investigate the sensitivity of the parameters of the transmission window on the coupling strength and on the circuit elements of the individual resonators, and we interpret the results in terms of two linearly coupled Lorentzian resonators. Our metamaterial designs combine low losses with the extremely small group velocity associated with the resonant response in the transmission window, rendering them suitable for slow light applications at room temperature.