Quantum-enhanced optical systems operating within the 2- to 2.5-mu m 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-mu m 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.

Two-photon quantum interference and entanglement at 2.1 mu m

Caspani L;Clerici M
2020-01-01

Abstract

Quantum-enhanced optical systems operating within the 2- to 2.5-mu m 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-mu m 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.
2020
Prabhakar, S; Shields, T; Dada, Ac; Ebrahim, M; Taylor, Gg; Morozov, D; Erotokritou, K; Miki, S; Yabuno, M; Terai, H; Gawith, C; Kues, M; Caspani, L; Hadfield, Rh; Clerici, M
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11383/2165599
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