Transient dynamics of subradiance and superradiance in open optical ensembles

TL;DR

This paper presents a computational Maxwell-Bloch framework to study out-of-equilibrium optical emitters, capturing superradiant and subradiant behaviors in open quantum dot systems with detailed light-matter interactions.

Contribution

It introduces a semiclassical method that self-consistently models radiative coupling and phase effects in large optical ensembles, enabling detailed time-domain analysis.

Findings

Observation of superradiant directionality and decay

Detection of subradiant emission signatures

Comparison with Master equation results validates the approach

Abstract

We introduce a computational Maxwell-Bloch framework for investigating out-of-equilibrium optical emitters in open systems. To do so, we compute the pulse-induced dynamics of each emitter from fundamental light-matter interactions and self-consistently calculate their radiative coupling, including phase inhomogeneity from propagation effects. This semiclassical framework is applied to open quantum dots systems with different densities and dipolar coupling. We observe signatures of superradiant behavior, such as directionality and faster decay, as well as subradiant emission. We compare and discuss the computed light emission obtained with our method and a Master equation approach. Our framework enables quantitative investigations of large optical ensembles in the time domain and could be used to design new systems with enhanced superradiant and subradiant properties.