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Coherent Spin Control of a Tin Vacancy Center in Diamond

Abigail Stein, Hannah Calzi Kleidermacher, Eric I. Rosenthal, Hope Lee, Jakob Grzesik, Alison E. Rugar, Daniel Riedel, Shahriar Aghaeimeibodi, Geun Ho Ahn, Kasper Van Gasse, Giovanni Scuri, Christopher P. Anderson, Jelena Vuckovic A

Published Jan 1, 2023• 0 citations
Publisher

Abstract

We demonstrate coherent spin physics of a single tin vacancy center (SnV−) in diamond pillars including coherent population trapping and Rabi oscillations. This work constitutes progress towards scalable quantum networks using SnV− centers.
DOI
10.1364/cleo_si.2023.sm1k.4

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Quantum emitters in diamond are a promising candidate for quantum network applications. Here, we show basic properties of tin-vacancy (SnV) centers in diamond, which we recently discovered. The SnV center shows a sharp zero phonon line and a high fluorescence intensity. The SnV center has a possibility to have a long spin coherence time in the Kelvin temperature range, in contrast to other group-IV color centers, i.e. silicon-vacancy and germanium-vacancy centers. We discuss important experiments regarding spin and optical properties of the SnV quantum emitter for further development towards quantum network.
The realization of quantum networks critically depends on establishing efficient, coherent light-matter interfaces. Optically active spins in diamond have emerged as promising quantum nodes based on their spin-selective optical transitions, long-lived spin ground states, and potential for integration with nanophotonics. Tin-vacancy (SnV -^{\,\textrm{-}}-) centers in diamond are of particular interest because they exhibit narrow-linewidth emission in nanostructures and possess long spin coherence times at temperatures above 1 K. However, a nanophotonic interface for SnV -^{\,\textrm{-}}- centers has not yet been realized. Here, we report cavity enhancement of the emission of SnV -^{\,\textrm{-}}- centers in diamond. We integrate SnV -^{\,\textrm{-}}- centers into one-dimensional photonic crystal resonators and observe a 40-fold increase in emission intensity. The Purcell factor of the coupled system is 25, resulting in channeling of the majority of photons (90%90\%90%) into the cavity mode. Our results pave the way for the creation of efficient, scalable spin-photon interfaces based on SnV -^{\,\textrm{-}}- centers in diamond.