Emission enhancement in dielectric nanocomposites

TL;DR

This paper introduces a universal, simple method to calculate emission enhancement in dielectric nanocomposites, accounting for particle shape, arrangement, and refractive index contrast, applicable to both dilute and dense systems.

Contribution

A novel quasistatic calculation method for emission enhancement in dielectric nanocomposites that considers shape, arrangement, and refractive index contrast.

Findings

Emission enhancement varies with particle shape and arrangement.

The method accurately predicts enhancement in both dilute and dense nanocomposites.

Guidelines for maximizing emission enhancement are provided.

Abstract

We consider emitting nanoparticles in dielectric nanocomposites with varying refractive index contrast and geometry. For that we develop a simple and universal method to calculate the emission enhancement in nanocomposites that employs solely the calculation of the effective refractive index and electric field distributions from three quasistatic calculations with orthogonal polarizations. The method is exemplified for dilute nanocomposites without electromagnetic interaction between emitting particles as well as for dense nanocomposites with strong particle interaction. We show that the radiative decay in dielectric nanocomposites is greatly affected by the shape and arrangement of its constituents and give guidelines for larger enhancement.