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

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 $\approx 11,000$ fiber cavity, resulting in a $31_{-15}^{+11}$-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.

arXiv comment7 pages, 6 figures

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• Quantum networks based on color centers in diamond
• Cavity quantum electrodynamics with color centers in diamond
• Resonant Excitation and Purcell Enhancement of Coherent Nitrogen-Vacancy Centers Coupled to a Fabry-Pérot Micro-Cavity
• Diamond Integrated Quantum Photonics: A Review
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• High quality-factor diamond-confined open microcavity
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• The physical origins of extreme cross-polarization extinction in confocal microscopy
• Coherent Coupling of a Diamond Tin-Vacancy Center to a Tunable Open Microcavity
• Observation of size-dependent boundary effects in non-Hermitian electric circuits
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• A mechanically stable and tunable cryogenic Fabry-Perot microcavity
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• Cavity enhancement of V2 centers in 4H-SiC with a fiber-based Fabry-Pérot microcavity
• Fabrication of Customized, Low-Loss Optical Resonators by Combination of FIB-Milling and CO${}_2$ Laser Ablation
• Harnessing the Diamond-Air Interface as an Efficient Photon Antenna for Solid-State Emitters