Lifetime Reduction of Single Germanium-Vacancy Centers in Diamond via a Tunable Open Microcavity

• URL: http://arxiv.org/abs/2312.14313v3
• Date: Thu, 16 May 2024 17:06:50 GMT
• Title: Lifetime Reduction of Single Germanium-Vacancy Centers in Diamond via a Tunable Open Microcavity
• Authors: Rigel Zifkin, César Daniel Rodríguez Rosenblueth, Erika Janitz, Yannik Fontana, Lilian Childress,
• Abstract summary: Coupling between a single quantum emitter and an optical cavity presents a key capability for future quantum networking applications. We explore interactions between individual germanium-vacancy (GeV) defects in diamond and an open microcavity at cryogenic temperatures.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Coupling between a single quantum emitter and an optical cavity presents a key capability for future quantum networking applications. Here, we explore interactions between individual germanium-vacancy (GeV) defects in diamond and an open microcavity at cryogenic temperatures. Exploiting the tunability of our microcavity system to characterize and select emitters, we observe a Purcell-effect-induced lifetime reduction of up to $4.5\pm0.3$, and extract coherent coupling rates up to $360\pm20$ MHz. Our results indicate that the GeV defect has favorable optical properties for cavity coupling, with a quantum efficiency of at least $0.34\pm0.05$ and likely much higher.

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