Two-photon quantum interference and entanglement at 2.1 µm

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Prabhakar, S.; Shields, T.; Dada, A.C.; Ebrahim, M.; Taylor, G.G. et al.: Two-photon quantum interference and entanglement at 2.1 µm. In: Science Advances 6 (2020), Nr. 13, eaay5195. DOI:

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Sum total of downloads: 24

Quantum-enhanced optical systems operating within the 2- to 2.5-μm spectral region have the potential to revolutionize emerging applications in communications, sensing, and metrology. However, to date, sources of entangled photons have been realized mainly in the near-infrared 700- to 1550-nm spectral window. Here, using custom-designed lithium niobate crystals for spontaneous parametric down-conversion and tailored superconducting nanowire single-photon detectors, we demonstrate two-photon interference and polarization-entangled photon pairs at 2090 nm. These results open the 2- to 2.5-μm mid-infrared window for the development of optical quantum technologies such as quantum key distribution in next-generation mid-infrared fiber communication systems and future Earth-to-satellite communications. Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY).
License of this version: CC BY 4.0 Unported
Document Type: article
Publishing status: publishedVersion
Issue Date: 2020
Appears in Collections:Forschungszentren

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pos. country downloads
total perc.
1 image of flag of Germany Germany 8 33.33%
2 image of flag of United States United States 5 20.83%
3 image of flag of No geo information available No geo information available 2 8.33%
4 image of flag of China China 2 8.33%
5 image of flag of Russian Federation Russian Federation 1 4.17%
6 image of flag of Romania Romania 1 4.17%
7 image of flag of Japan Japan 1 4.17%
8 image of flag of Iran, Islamic Republic of Iran, Islamic Republic of 1 4.17%
9 image of flag of France France 1 4.17%
10 image of flag of Canada Canada 1 4.17%
    other countries 1 4.17%

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