A quantum light emitting diode for the standard telecom window around 1550 nm

Abstract

For the development of long-distance quantum networks, sources of single photons and entangled photon pairs emitting in the low-loss wavelength region around 1550 nm are a crucial building block. Here we show that quantum dot devices based on indium phosphide are capable of electrically injected single photon emission in this wavelength region with multiphoton events suppressed down to 0.11$\pm$0.02. Using the biexciton cascade mechanism, they further produce entangled photons with a fidelity of 87$\pm$4%, sufficient for the application of one-way error correction protocols. The new material allows for entangled photon generation up to an operating temperature of 93 K, reaching a regime accessible by electric coolers. The quantum photon source can be directly integrated with existing long distance quantum communication and cryptography systems and provides a new material platform for developing future quantum network hardware.

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Item Type:	Article
Authors/Creators:	Müller, T. Skiba-Szymanska, J. Krysa, A. https://orcid.org/0000-0001-8320-7354 Huwer, J. Felle, M. Anderson, M. Stevenson, R.M. Heffernan, J. Ritchie, D.A. Shields, A.J.
Copyright, Publisher and Additional Information:	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:	Quantum Physics; Mesoscale and Nanoscale Physics; Applied Physics
Dates:	Accepted: 29 January 2018 Published (online): 28 February 2018 Published: 28 February 2018
Institution:	The University of Sheffield
Academic Units:	The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Electronic and Electrical Engineering (Sheffield)
Funding Information:	Funder Grant number ENGINEERING AND PHYSICAL SCIENCE RESEARCH COUNCIL (EPSRC) UNSPECIFIED ENGINEERING AND PHYSICAL SCIENCE RESEARCH COUNCIL (EPSRC) EP/M508275/1 INNOVATE UK (TSB) 70628-492126 TS/P002560/1 ENGINEERING AND PHYSICAL SCIENCE RESEARCH COUNCIL (EPSRC) EP/R029253/1
Depositing User:	Symplectic Sheffield
Date Deposited:	05 Jan 2018 15:54
Last Modified:	06 Nov 2018 11:49
Published Version:	https://doi.org/10.1038/s41467-018-03251-7
Status:	Published
Publisher:	Nature Publishing Group
Refereed:	Yes
Identification Number:	10.1038/s41467-018-03251-7
Related URLs:	Author
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:125571

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A quantum light emitting diode for the standard telecom window around 1550 nm

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