Accessing the silicon vacancy centers electron spin in nanodiamonds with hybrid quantum photonics

ORAL

Abstract

Efficient connection of stationary- and flying qubits posts a formidable challenge yet is one of the demands for the development of applications like quantum networks, distributed quantum computing and quantum communication. Cavity quantum electrodynamics (cQED) typically serves as the tool to enhance light-matter interaction in order to realize spin-photon interfaces. Chip-integrated cavities have gained attention in recent years [1, 2], as they are accompanied with a small footprint which is benefitting scalability. Our efforts to realize such an efficient light-matter interface is based on a hybrid approach. Here, we utilize the electron spin degree of freedom of negatively charged silicon vacancy centers (SiV) as the spin system, hosted in a nanodiamond, which can provide prolonged orbital coherence [3]. The photon interface part is taken over by on one-dimensional photonic crystal cavities in silicon nitride (Si3N4). This hybrid interconnection allows for separate optimization of the photonic design as well as preselection of the nanodiamond host. Here, we present our progress of this interconnection and the achieved cQED parameters, which has provided Purcell broadened optical access to the SiV centers electron spin [4] while preserving the spin-properties of the SiV, even after integration.

*The work is supported by the BMBF/VDI in Project HybridQToken. The authors acknowledge V.A. Davydov for synthesis and processing of the nanodiamond material. D.W. acknowledges funding from the DFG (CRC 1459). H.G. acknowledges financial support of the Studienstiftung des deutschen Volkes.

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Publication: [1] Fehler et al., https://doi.org/10.1021/acsnano.9b01668
[2] Kubanek et al., https://link.springer.com/chapter/10.1007/978-3-031-16518-4_5
[3] Klotz et al., https://doi.org/10.1103/PhysRevLett.128.153602
[4] Antoniuk et al., https://arxiv.org/pdf/2308.15544.pdf

Presenters

  • Lukas Antoniuk

    • Insitut for Quantum Optics University Ulm
    • University Ulm, Insitute for Quantum Optics, Germany

Authors

  • Lukas Antoniuk

    • Insitut for Quantum Optics University Ulm
    • University Ulm, Insitute for Quantum Optics, Germany

  • Niklas Lettner

    • Institute for Quantum Optics, Ulm University, Ulm, Germany | Center for Integrated Quantum Science and Technology (IQST), Ulm, Germany
    • Institute for Quantum Optics, Ulm University, Ulm, Germany / Center for Integrated Quantum Science and Technology (IQST)

  • Anna Ovvyan

    • Institute of Physics and Center for Nanotechnology, University of Münster, Germany | Kirchhoff-Institute for Physics, Heidelberg University, Germany
    • Institute of Physics and Center for Nanotechnology, Münster, Germany

  • Marco Klotz

    • Institut für Quantenoptik
    • University Ulm, Insitute for Quantum Optics, Germany

  • Helge Gehring

    • Institute of Physics and Center for Nanotechnology, University of Münster, Germany
    • Institute of Physics and Center for Nanotechnology, Münster, Germany / SoN / CeNTech

  • Daniel Wendland

    • Institute of Physics and Center for Nanotechnology, University of Münster, Germany | Kirchhoff-Institute for Physics, Heidelberg University, Germany
    • Institute of Physics and Center for Nanotechnology, Münster, Germany / SoN / CeNTech

  • Viatcheslav N Agafonov

    • GREMAN, UMR 7347 CNRS, INSA-CVL, Tours University, 37200 Tours, France
    • GREMAN, UMR 7347 CNRS, INSA-CVL, Tours University, France

  • Wolfram H Pernice

    • Kirchhoff-Institute for Physics, Heidelberg University | Institute of Physics and Center for Nanotechnology, University of Münster| SoN Center for Soft Nanoscience, Münster
    • Institute of Physics and Center for Nanotechnology, Münster, Germany / SoN / CeNTech / Kirchhoff-Institute for Physics, Heidelberg University, Germany

  • Alexander Kubanek

    • University Ulm
    • Ulm University/Institute for Quantum Optics
    • Institute for Quantum Optics, Ulm University, D-89081 Ulm
    • Institute for Quantum Optics, Ulm University, Ulm, Germany
    • University Ulm, Insitute for Quantum Optics, Germany
    • University Ulm, Institute for Quantum Optics