Kavli Affiliate: Andrei Faraon
| First 5 Authors: Mi Lei, Rikuto Fukumori, Jake Rochman, Bihui Zhu, Manuel Endres
| Summary:
Quantum emitters coupled to optical resonators are quintessential systems for
exploring fundamental phenomena in cavity quantum electrodynamics (cQED) and
are commonly used in quantum devices acting as qubits, memories and
transducers. Many previous experimental cQED studies have focused on regimes in
which a small number of identical emitters interact with a weak external drive,
such that the system can be described with simple, effective models. However,
the dynamics of a disordered, many-body quantum system subject to a strong
drive have not been fully explored, despite its importance and potential in
quantum applications. Here we study how a large, inhomogeneously broadened
ensemble of solid-state emitters coupled with high cooperativity to a
nanophotonic resonator behaves under strong excitation. We discover a sharp,
collectively induced transparency (CIT) in the cavity reflection spectrum,
resulting from quantum interference and collective response induced by the
interplay between driven inhomogeneous emitters and cavity photons.
Furthermore, coherent excitation within the CIT window leads to highly
nonlinear optical emission, spanning from fast superradiance to slow
subradiance. These phenomena in the many-body cQED regime enable new mechanisms
for achieving slow light and frequency referencing, pave a way towards
solid-state superradiant lasers and inform the development of ensemble-based
quantum interconnects.
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