Optical and spin coherence of Er3+ in epitaxial CeO2 on silicon

ORAL

Abstract

Trivalent erbium ions (Er3+) are promising spin defects for developing quantum memories in quantum communication networks due to their unique spin-photon interface at telecommunication band. To this end, controlling the local host environment to enable long-lived Er3+ electron spins in a technology compatible platform is key. Here, we report on a new qubit system Er3+: CeO2 (cerium dioxide) epitaxially grown on silicon with near-zero nuclear spin environment critical for supporting long-lived spins1 and in a silicon compatible platform2 for device integration. We study the optical and spin coherence properties of Er3+ in this system and demonstrate narrow homogeneous linewidth of 440 kHz with an optical coherence time of 0.72 μs at 3.6 K3. The slow spin-lattice relaxation enables direct observation of spin dynamics at 3.6 K. The Er3+ electron spins have a reasonable long spin relaxation of 2.5 ms and a spin coherence of 0.66 μs (in the isolated ion limit)3. These findings indicate the potential of Er3+:CeO2 qubit systems as a scalable platform for quantum networks and communication applications.

(1) S. Kanai, et al. PNAS. 119, e2121808119 (2022).

(2) G. Grant, et al. arXiv:2309.16644 (2023).

(3) J. Zhang, et al. arXiv:2309.16785 (2023).

* This work was primarily supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division with additional support from Q-NEXT, a U.S. Department of Energy Office of Science National Quantum Information Science Research Centers and Air Force Office of Scientific Research.

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Publication: G. Grant, et al. arXiv:2309.16644 (2023).
J. Zhang, et al. arXiv:2309.16785 (2023).

Presenters

  • Jiefei Zhang

    Argonne National Laboratory

Authors

  • Jiefei Zhang

    Argonne National Laboratory

  • Gregory Grant

    University of Chicago / Argonne National Lab, University of Chicago

  • Ignas Masiulionis

    University of Chicago / Argonne National Lab, University of Chicago/Argonne National Laboratory, University of Chicago

  • Michael T Solomon

    University of Chicago

  • Jonathan C Marcks

    Argonne National Laboratory

  • Jasleen Bindra

    Argonne National Lab, Argonne National Laboratory

  • Jens Niklas

    Argonne National Lab, Argonne National Laboratory

  • Alan M Dibos

    Argonne National Laboratory, Argonne National Lab

  • Oleg G Poluektov

    Argonne National Lab, Argonne National Laboratory

  • F. Joseph F Heremans

    Argonne National Laboratory, Argonne National Lab, Argonne, University of Chicago

  • Supratik Guha

    Argonne National Laboratory, University of Chicago/Argonne National Laboratory

  • David D Awschalom

    University of Chicago