Single-photon emission from single-electron transport in a SAW-driven lateral light-emitting diode

Abstract

The long-distance quantum transfer between electron-spin qubits in semiconductors is important for realising large-scale quantum computing circuits. Electron-spin to photon-polarisation conversion is a promising technology for achieving free-space or fibre-coupled quantum transfer. In this work, using only regular lithography techniques on a conventional 15 nm GaAs quantum well, we demonstrate acoustically-driven generation of single photons from single electrons, without the need for a self-assembled quantum dot. In this device, a single electron is carried in a potential minimum of a surface acoustic wave (SAW) and is transported to a region of holes to form an exciton. The exciton then decays and creates a single optical photon within 100 ps. This SAW-driven electroluminescence, without optimisation, yields photon antibunching with g(2)(0) = 0.39 ± 0.05 in the single-electron limit (g(2)(0) = 0.63 ± 0.03 in the raw histogram). Our work marks the first step towards electron-to-photon (spin-to-polarisation) qubit conversion for scaleable quantum computing architectures.

Metadata

Item Type:	Article
Authors/Creators:	Hsiao, T.-K. https://orcid.org/0000-0001-5140-2809 Rubino, A. Chung, Y. Son, S.-K. https://orcid.org/0000-0002-9530-2639 Hou, H. Pedrós, J. https://orcid.org/0000-0002-3154-0187 Nasir, A. https://orcid.org/0000-0003-1321-8036 Éthier-Majcher, G. Stanley, M.J. Phillips, R.T. https://orcid.org/0000-0002-8279-3475 Mitchell, T.A. Griffiths, J.P. Farrer, I. https://orcid.org/0000-0002-3033-4306 Ritchie, D.A. https://orcid.org/0000-0002-9844-8350 Ford, C.J.B. https://orcid.org/0000-0002-4557-3721
Copyright, Publisher and Additional Information:	© The Author(s) 2020. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, 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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.
Keywords:	Acoustics; Quantum information; Single photons and quantum effects
Dates:	Published: 14 February 2020 Published (online): 14 February 2020 Accepted: 14 January 2020
Institution:	The University of Sheffield
Academic Units:	The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Electronic and Electrical Engineering (Sheffield)
Depositing User:	Symplectic Sheffield
Date Deposited:	13 Apr 2023 14:56
Last Modified:	13 Apr 2023 14:56
Published Version:	http://dx.doi.org/10.1038/s41467-020-14560-1
Status:	Published
Publisher:	Springer Science and Business Media LLC
Refereed:	Yes
Identification Number:	10.1038/s41467-020-14560-1
Related URLs:	PubMed URL
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:198066

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Single-photon emission from single-electron transport in a SAW-driven lateral light-emitting diode

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