Anticrossing in the PL spectrum of light-matter coupling under incoherent continuous pumping

TL;DR

This paper investigates the differences between observed and dressed mode splittings in the photoluminescence spectrum of a strongly coupled light-matter system under incoherent continuous pumping, highlighting the effects of decoherence.

Contribution

It provides a comparison between observed PL spectral splitting and dressed mode splitting, emphasizing the impact of decoherence on their relationship.

Findings

Observed splitting can differ significantly from dressed mode splitting due to decoherence.

Dressed mode splitting has a simple analytical expression, unlike observed splitting.

Decoherence effects are crucial in interpreting light-matter coupling spectra.

Abstract

We compare the observed splitting in the PL spectrum of a strongly coupled light-matter system, with the splitting of its dressed modes. In the presence of non-negligible decoherence, the two may differ considerably. Whereas the dressed mode splitting has a simple expression, the observed splitting has no general analytical expression in terms of radicals of the system parameters.