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
where 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 elucidated, despite its significance and potential in
quantum applications. Here we study how a large inhomogeneously broadened
ensemble of solid-state emitters coupled with high cooperativity to a
nano-photonic resonator behaves under strong excitation. We discover a sharp,
collectively induced transparency (CIT) in the cavity reflection spectrum,
resulting from quantum interference and collective nonlinear 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 nonlinear 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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