Anomalous Purcell decay of strongly driven inhomogeneous emitters coupled to a cavity

• DOI: 10.48550/arxiv.2309.16641
• Publication Date: 2024-06-18
• Authors: Michael T. Solomon; Martin Koppenhöfer; Mikhail Mamaev; Cheng Ji; Gregory Grant; Ignas Masiulionis; Sean E. Sullivan; F. Joseph Heremans; Supratik Guha; David D. Awschalom; Aashish A. Clerk; Alan M. Dibos
• Keywords: 0301 basic medicine; Quantum Physics; 03 medical and health sciences; FOS: Physical sciences; Quantum Physics (quant-ph)

We perform resonant fluorescence lifetime measurements on a nanocavity-coupled erbium ensemble as a function of cavity-laser detuning and pump power. Our measurements reveal an anomalous three-fold suppression of the ensemble Purcell factor at zero cavity detuning and high pump fluence. We capture qualitative aspects of this decay rate suppression using a Tavis–Cummings model of non-interacting spins coupled to a common cavity.