Optical and spin coherence of Er spin qubits in epitaxial cerium dioxide on silicon
Zhang, Jiefei; Grant, Gregory D.; Masiulionis, Ignas; Solomon, Michael T.; Marcks, Jonathan C.; Bindra, Jasleen K.; Niklas, Jens; Dibos, Alan M.; Poluektov, Oleg G.; Heremans, F. Joseph; Guha, Supratik; Awschalom, David D.
2024
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Abstract

Robust spin-photon interfaces with optical transitions in the telecommunication band are essential for quantum networking technologies. Erbium (Er) ions are the ideal candidate with environmentally protected transitions in telecom-C band. Finding the right technologically compatible host material to enable long-lived spins remains a major hurdle. We introduce a new platform based on Er ions in cerium dioxide (CeO2) as a nearly-zero nuclear spin environment (0.04%) epitaxially grown on silicon, offering silicon compatibility for opto-electrical devices. Our studies focus on Er3+ ions and show a narrow homogeneous linewidth of 440 kHz with an optical coherence time of 0.72 μs at 3.6 K. The reduced nuclear spin noise enables a slow spin-lattice relaxation with a spin relaxation time up to 2.5 ms and an electron spin coherence time of 0.66 μs (in the isolated ion limit) at 3.6 K. These findings highlight the potential of Er3+:CeO2 platform for quantum networks applications.

Details

Title
Optical and spin coherence of Er spin qubits in epitaxial cerium dioxide on silicon
Author
Zhang, Jiefei : Argonne National Laboratory : (http://orcid.org/0000-0002-7329-3110)
Grant, Gregory D. : University of Chicago
Masiulionis, Ignas : University of Chicago
Solomon, Michael T. : University of Chicago : (http://orcid.org/0000-0002-2716-668X)
Marcks, Jonathan C. : University of Chicago : (http://orcid.org/0000-0002-6162-8091)
Bindra, Jasleen K. : Argonne National Laboratory
Niklas, Jens : Argonne National Laboratory : (http://orcid.org/0000-0002-6462-2680)
Dibos, Alan M. : Argonne National Laboratory : (http://orcid.org/0000-0001-5935-1364)
Poluektov, Oleg G. : Argonne National Laboratory
Heremans, F. Joseph : University of Chicago : (http://orcid.org/0000-0003-3337-7958)
Guha, Supratik : University of Chicago
Awschalom, David D. : University of Chicago : (http://orcid.org/0000-0002-8591-2687)
Content Type
Article
Published in
npj Quantum Information
Identifier(s)
DOI: https://doi.org/10.1038/s41534-024-00903-z
Data availability statement
The data that support the findings of this study are available from the corresponding author upon reasonable request.
Funding Information
U.S. Department of Energy, Q-NEXT, DE-FOA-0002253
U.S. Department of Energy, DE-AC02-06CH11357
Air Force Research Office, FA9550–23-1-0667
Publication Date
2024-11-20
Language
English
Copyright Statement

© David Awschalom, Supratik Guha and UChicago Argonne, LLC, Operator of Argonne National Laboratory 2024

This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License, which permits any non-commercial use, sharing, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if you modified the licensed material. You do not have permission under this licence to share adapted material derived from this article or parts of it. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by-nc-nd/4.0/.

Record Appears in
Physical Sciences Division > Physics
Pritzker School of Molecular Engineering
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Record Created
2024-11-24

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