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Conference on Lasers and Electro-Optics

Generating Quantum Light: New Prospects from Superradiance

Gefen Baranes, Alexey A. Gorlach, Ron Ruimy, Michael Faran, Andrea Pizzi, Ido E. Kaminer

Published Jan 1, 2022• 0 citations
Publisher

Abstract

We discover a property universal to all superradiant processes: the radiation undergoes a transition from classical to quantum, distinguished by a negative Wigner function, opening new avenues toward the generation of engineered quantum light states.
DOI
10.1364/cleo_qels.2022.fm3b.4

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Light is often characterized only by its classical properties, like intensity or coherence. When looking at its quantum properties, described by photon correlations, new information about the state of the matter generating the radiation can be revealed. In particular the difference between independent and entangled emitters, which is at the heart of quantum mechanics, can be made visible in the photon statistics of the emitted light. The well-studied phenomenon of superradiance occurs when quantum-mechanical correlations between the emitters are present. Notwithstanding, superradiance was previously demonstrated only in terms of classical light properties. Here, we provide the missing link between quantum correlations of the active material and photon correlations in the emitted radiation. We use the superradiance of quantum dots in a cavity-quantum electrodynamics laser to show a direct connection between superradiant pulse emission and distinctive changes in the photon correlation function. This directly demonstrates the importance of quantum-mechanical correlations and their transfer between carriers and photons in novel optoelectronic devices.