Few-mode Field Quantization of Arbitrary Electromagnetic Spectral Densities

TL;DR

This paper introduces a new few-mode quantization framework that simplifies modeling quantum emitters in complex electromagnetic environments by fitting spectral densities to a small set of modes, validated through plasmonic-photonic structure simulations.

Contribution

The authors present a novel few-mode quantization method that accurately describes emitter-environment interactions using spectral density fitting, reducing computational complexity.

Findings

Effective modeling of spontaneous emission in complex structures

Accurate electric field and population dynamics predictions

Validation through hybrid plasmonic-photonic simulations

Abstract

We develop a framework that provides a few-mode master equation description of the interaction between a single quantum emitter and an arbitrary electromagnetic environment. The field quantization requires only the fitting of the spectral density, obtained through classical electromagnetic simulations, to a model system involving a small number of lossy and interacting modes. We illustrate the power and validity of our approach by describing the population and electric field dynamics in the spontaneous decay of an emitter placed in a complex hybrid plasmonic-photonic structure.