Chiral quantum optics with scalable quantum dot dimers

Abstract

We present a scalable method for electrically tuning multiple spatially separated quantum dots (QDs) embedded in photonic crystal waveguides. Ion implantation into the top p-doped layer of a p-i-n diode creates high-resistivity tracks, providing electrical separation between adjacent regions. This method preserves the guided-mode profile of the waveguide, minimising backscatter and loss, enabling the observation of highly directional emission from two individually addressable QDs coupled to a glide-plane photonic crystal waveguide. We demonstrate control of the detuning between the QDs, enabling measurements of different indistinguishable spin-state combinations of two highly directional QDs coupled to the same mode. Second-order photon correlation measurements provide a sensitive probe of the chirality-dependent photon statistics, which are in good agreement with a waveguide-QED master equation model. Our results mark an important step towards scalable, multi-emitter architectures for chiral quantum networks.

Metadata

Item Type:	Article
Authors/Creators:	Hallacy, L. Hallett, D. Fenzl, A. https://orcid.org/0000-0002-0407-1549 Martin, N.J. Dost, R. https://orcid.org/0000-0002-8578-0389 Verma, A. Fletcher, J. Farrer, I. Antwis, L. Skolnick, M.S. Wilson, L.R.
Copyright, Publisher and Additional Information:	© The Author(s) 2026. 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 licence, and indicate if changes were made. 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/4.0/.
Keywords:	Quantum Physics; Engineering; Physical Sciences
Dates:	Submitted: 23 December 2025 Accepted: 26 August 2026 Published (online): 9 September 2026 Published: 9 September 2026
Institution:	The University of Sheffield
Academic Units:	The University of Sheffield > Faculty of Science (Sheffield) > School of Mathematical and Physical Sciences
Funding Information:	Funder Grant number ENGINEERING AND PHYSICAL SCIENCE RESEARCH COUNCIL EP/V026496/1
Date Deposited:	17 Sep 2026 14:09
Last Modified:	17 Sep 2026 14:09
Status:	Published
Publisher:	Springer Science and Business Media LLC
Refereed:	Yes
Identification Number:	10.1038/s44310-026-00148-y
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:245594

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Chiral quantum optics with scalable quantum dot dimers

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