Cavity-Enhanced Photon Emission from a Single Germanium-Vacancy Center in a Diamond Membrane

Rasmus Høy Jensen*, Erika Janitz, Yannik Laurent Fontana, Yi He, Olivier Gobron, Ilya Radko, Mihir Bhaskar, Ruffin Evans, César Daniel Rodríguez Rosenbluth, Lilian Childress, Alexander Huck, Ulrik Lund Andersen

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearch

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The nitrogen-vacancy center in diamond has been explored extensively as a light-matter interface for quantum information applications, however it is limited by low coherent photon emission and spectral instability. Here, we present a promising interface based on an alternate defect with superior optical properties (the germanium-vacancy) coupled to a finesse 11,000 fiber cavity, resulting in a 31+12
−15 -fold increase in the spectral density of emission. This work sets the stage for cryogenic experiments, where we predict a factor of 20+7−10 increase in the spontaneous emission rate.
Original languageEnglish
Publication statusSubmitted - 2020

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