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Quantum Non-linear Optics with a Diamond Tin-Vacancy Center in a Fiber-based Microcavity

Yanik Herrmann, Julius Fischer, Julia M. Brevoord, Colin Sauerzapf, Leonardo G. C. Wienhoven, Laurens J. Feije, Matteo Pasini, Martin Eschen, Maximilian Ruf, Matthew J. Weaver, Ronald Hanson

Published Jan 1, 2024• 0 citations
Publisher

Abstract

We demonstrate coherent coupling of a single diamond Tin-Vacancy center to a fiber-based microcavity, showing a cavity transmission dip of 50 % on resonance, and altered photon statistics in cavity transmission.
DOI
10.1364/cleo_fs.2024.fm3f.1

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Efficient coupling of optically active qubits to optical cavities is a key challenge for solid-state-based quantum optics experiments and future quantum technologies. Here we present a quantum photonic interface based on a single tin-vacancy center in a micrometer-thin diamond membrane coupled to a tunable open microcavity. We use the full tunability of the microcavity to selectively address individual tin-vacancy centers within the cavity mode volume. Purcell enhancement of the tin-vacancy center optical transition is evidenced both by optical excited state lifetime reduction and by optical linewidth broadening. As the emitter selectively reflects the single-photon component of the incident light, the coupled emitter-cavity system exhibits strong quantum nonlinear behavior. On resonance, we observe a transmission dip of 50% for low incident photon number per Purcell-reduced excited state lifetime, while the dip disappears as the emitter is saturated with higher photon number. Moreover, we demonstrate that the emitter strongly modifies the photon statistics of the transmitted light by observing photon bunching. This work establishes a versatile and tunable platform for advanced quantum optics experiments and proof-of-principle demonstrations on quantum networking with solid-state qubits. Published by the American Physical Society 2024
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