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

Rasmus Høy Jensen, Erika Janitz, Yannik Fontana, He Yi, Olivier Gobron, Ilya P. Radko, Mihir K. Bhaskar, Ruffin E. Evans, César Daniel Rodríguez Rosenblueth, Lilian Childress

Abstract

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 $\approx11{,}000$ fiber cavity, resulting in a $31^{+11}_{-15}$-fold increase in the spectral density of emission. This work sets the stage for cryogenic experiments, where we predict a measurable increase in the spontaneous emission rate.

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• Physical Review Applied - View
• arXiv (Cornell University) - View - PDF
• Technical University of Denmark, DTU Orbit (Technical University of Denmark, DTU) - View - PDF
• eScholarship@McGill (McGill) - View - PDF
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