Localization of Electromagnetic Fields in Disordered Fano Metamaterials

TL;DR

This paper investigates how positional disorder in Fano-type planar metamaterials affects electromagnetic field localization, revealing persistent magnetic excitations and the formation of magnetic hot-spots linked to collective magnetic modes.

Contribution

It is the first study to analyze disorder effects in strongly interacting Fano metamaterials, highlighting magnetic mode persistence and localization phenomena.

Findings

Disorder induces light localization in the metamaterials.

Magnetic excitations persist despite disorder.

Formation of magnetic hot-spots due to collective magnetic modes.

Abstract

We present the first study of disorder in planar metamaterials consisting of strongly interacting metamolecules, where coupled electric dipole and magnetic dipole modes give rise to a Fano-type resonant response and show that positional disorder leads to light localization inherently linked to collective magnetic dipole excitations. We demonstrate that the magnetic excitation persists in disordered arrays and results in the formation of "magnetic hot-spots".