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