Two-photon quantum interference and entanglement at 2.1 μm
Abstract
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.
Details
- Organisation(s)
-
Hannover Centre for Optical Technologies (HOT)
PhoenixD: Photonics, Optics, and Engineering - Innovation Across Disciplines
- External Organisation(s)
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University of Glasgow
Japan National Institute of Information and Communications Technology
Kobe University
Covesion Ltd.
University of Southampton
University of Strathclyde
- Type
- Article
- Journal
- Science advances
- Volume
- 6
- ISSN
- 2375-2548
- Publication date
- 27.03.2020
- Publication status
- Published
- Peer reviewed
- Yes
- ASJC Scopus subject areas
- General
- Electronic version(s)
-
https://doi.org/10.1126/sciadv.aay5195 (Access:
Open
)
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Details in the research portal "Research@Leibniz University"
