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: https://doi.org/10.1126/sciadv.aay5195
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. 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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other countries | 6 | 8.00% |
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