Anomalous Purcell decay of strongly driven inhomogeneous emitters coupled to a cavity
Michael T. Solomon, Martin Koppenhöfer, Mikhail Mamaev, Cheng Ji, Gregory D. Grant, Ignas Masiulionis, Sean E. Sullivan, F. Joseph Heremans, Supratik Guha, D. D. Awschalom, Aashish A. Clerk, Alan Dibos · Optica Quantum · 2024
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.