Exciton-induced transparency in hybrid plasmonic systems

TL;DR

This paper develops a microscopic model explaining exciton-induced transparency in hybrid plasmonic systems, highlighting the energy exchange imbalance as the core mechanism and providing an analytic description of the transparency window.

Contribution

The study introduces a detailed microscopic model linking energy transfer rates to exciton-induced transparency in hybrid plasmonic systems, with an analytic formula for the transparency feature.

Findings

ExIT arises from energy exchange imbalance in weak coupling.

Analytic expression accurately predicts transparency window shape.

Numerical calculations support the theoretical model.

Abstract

We present a microscopic model for exciton-induced transparency (ExIT) in a hybrid system comprised of an emitter resonantly coupled to a surface plasmon in a metal-dielectric structure. We obtain an effective optical polarizability of such a system with coupling between the system components expressed in terms of energy transfer rates. We demonstrate that, in the weak coupling regime, the underlying mechanism of ExIT is the energy exchange imbalance between the plasmon and the emitter in a narrow frequency region. We derive in analytic form a frequency-dependent function that accurately describes the shape and amplitude of the transparency window in scattering spectra, supported by numerical calculations.