Metamaterial transparency induced by cooperative electromagnetic interactions

TL;DR

This paper introduces CAIT, a new type of transparency in metamaterials caused by cooperative interactions among resonators, enabling sharp transmission resonances and dynamic control, distinct from traditional electromagnetically induced transparency.

Contribution

The study presents the concept of cooperative asymmetry-induced transparency (CAIT) in metamaterials, highlighting its cooperative nature and active reconfigurability, unlike previous independent-emitter models.

Findings

CAIT exhibits sharp transmission resonance despite broad individual resonances.

Dynamic reconfiguration enables active control of metamaterial transparency.

CAIT relies on strong radiative couplings, differing from electromagnetically induced transparency.

Abstract

We propose a cooperative asymmetry-induced transparency, CAIT, formed by collective excitations in metamaterial arrays of discrete resonators. CAIT can display a sharp transmission resonance even when the constituent resonators individually exhibit broad resonances. We further show how dynamically reconfiguring the metamaterial allows one to actively control the transparency. While reminiscent of electromagnetically induced transparency, which can be described by independent emitters, CAIT relies on a cooperative response resulting from strong radiative couplings between the resonators.