Related papers: Enhanced Spectral Density of a Single Germanium Vacancy Center in a Nanodiamond by Cavity-Integration

Enhanced Spectral Density of a Single Germanium Vacancy Center in a Nanodiamond by Cavity-Integration

URL: http://arxiv.org/abs/2307.00916v2
Date: Thu, 30 Nov 2023 07:20:00 GMT
Title: Enhanced Spectral Density of a Single Germanium Vacancy Center in a Nanodiamond by Cavity-Integration
Authors: Florian Feuchtmayr, Robert Berghaus, Selene Sachero, Gregor Bayer, Niklas Lettner, Richard Waltrich, Patrick Maier, Viatcheslav Agafonov and Alexander Kubanek
Abstract summary: Color centers in diamond, among them the negatively-charged germanium vacancy (GeV$-$), are promising candidates for many applications of quantum optics. We demonstrate the transfer of a nanodiamond containing a single ingrown GeV- center with excellent optical properties to an open Fabry-P'erot microcavity.
Score: 35.759786254573896
License: http://creativecommons.org/licenses/by/4.0/
Abstract: Color centers in diamond, among them the negatively-charged germanium vacancy (GeV$^-$), are promising candidates for many applications of quantum optics such as a quantum network. For efficient implementation, the optical transitions need to be coupled to a single optical mode. Here, we demonstrate the transfer of a nanodiamond containing a single ingrown GeV- center with excellent optical properties to an open Fabry-P\'erot microcavity by nanomanipulation utilizing an atomic force microscope. Coupling of the GeV- defect to the cavity mode is achieved, while the optical resonator maintains a high finesse of F = 7,700 and a 48-fold spectral density enhancement is observed. This article demonstrates the integration of a GeV- defect with a Fabry-P\'erot microcavity under ambient conditions with the potential to extend the experiments to cryogenic temperatures towards an efficient spin-photon platform.

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