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Quantum 2.0 Conference and Exhibition

Scalable Photonic Integration of Long-Lived Tin-Vacancy Memories at 1.3 K

Ian Christen, Hamza Raniwala, Marco Colangelo, Kevin C. Chen, Lorenzo De Santis, Yixuan Song, Carlos Errando-Herranz, Isaac Harris, Eric A. Bersin, Karl K. Berggren, Matthew E. Trusheim, Dirk Englund, P. Ben Dixon, Xingyu Zhang, Katia Shtyrkova, Ryan P. Murphy, Scott A. Hamilton

Published Jan 1, 2022• 0 citations
Publisher

Abstract

We demonstrate a scalable integrated photonics platform operating at 1.3 K as an efficient microwave and optical interface for quantum memories based on tin-vacancy color centers in diamond.
DOI
10.1364/quantum.2022.qm2a.4

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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 ($90\%$) 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.

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Quantum Photonics with SnV Centers in Diamond

Shahriar Aghaeimeibodi, Jelena Vuckovic A

In this presentation, we will discuss our recent efforts on realizing a quantum photonic platform for diamond color centers. In particular, we demonstrate integration of tin-vacancy (SnV) spin qubits in diamond to optical waveguides, cavities, and nanopillars. We show that SnV centers created using our recent technique based on shallow ion implantation and overgrowth maintain their quality when placed in nanostructures.

Technical digest - International Electron Devices Meeting/Technical digest•Dec 11, 2021•2 citations
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.