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Nanodiamonds With Group IV Defects Coupled to Fabry-Perot Resonators

Robert Berghaus, Gregor W. Bayer, Selene Sachero, Florian Feuchtmayr, V. Agafonov, Alexander Kubanek

Published Jan 1, 2024• 0 citations
Publisher

Abstract

Using color center in diamond (e.g. silicon vacancy) coupled to an open Fabry-Perot cavity, we present an efficient spin-photon interface. We demonstrate optical coherent driving of a silicon vacancy transition and Purcell enhancement.
DOI
10.1364/cleo_si.2024.sw4k.2

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Quantum networks rely on the efficient coupling of coherent quantum memories to photonic links. Tin-vacancy centers (SnV) have emerged as promising candidates for the implementation of an optically interfaced quantum memory based on their long spin coherence times at temperatures above 1K. To enhance their interaction with photons SnV centers need to be integrated with high-quality photonic structures. In this work, we report the enhancement of coherent emission of SnV centers by coupling them to a nanophotonic waveguide resonator. We observe strong intensity enhancement of the photon emission when the cavity is resonant with the color center. We demonstrate strong enhancement of the radiative recombination rate of SnV centers resulting in their predominant emission via the coherent zero-phonon line and into the cavity mode. These results are a significant step toward color-center-based quantum information processing applications without the need for dilution refrigerators.
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