Two-photon quantum interference and entanglement at 2.1 μm

Shashi Prabhakar; Taylor Shields; Adetunmise C. Dada; Mehdi Ebrahim; Gregor G. Taylor; Dmitry  Morozov; Kleanthis Erotokritou; Shigehito  Miki; Masahiro Yabuno; Hirotaka Terai; Corin Gawith; Michael Kues; Lucia Caspani; Robert H. Hadfield; Matteo Clerici

doi:10.1126/sciadv.aay5195

Two-photon quantum interference and entanglement at 2.1 μm

Shashi Prabhakar, Taylor Shields, Adetunmise C. Dada, Mehdi Ebrahim, Gregor G. Taylor, Dmitry Morozov, Kleanthis Erotokritou, Shigehito Miki, Masahiro Yabuno, Hirotaka Terai, Corin Gawith, Michael Kues, Lucia Caspani, Robert H. Hadfield, Matteo Clerici

Institute Of Photonics

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59 Citations (Scopus)

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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.

Original language	English
Article number	eaay5195
Number of pages	8
Journal	Science Advances
Volume	6
Issue number	13
DOIs	https://doi.org/10.1126/sciadv.aay5195
Publication status	Published - 27 Mar 2020

Keywords

quantum-enhanced optical systems
entangled photons
two-photon interference

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Prabhakar-etal-SA-2020-Two-photon-quantum-interference-and-entanglementFinal published version, 424 KBLicence: CC BY 4.0

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title = "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.",

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language = "English",

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AU - Prabhakar, Shashi

AU - Shields, Taylor

AU - Dada, Adetunmise C.

AU - Ebrahim, Mehdi

AU - Taylor, Gregor G.

AU - Morozov, Dmitry

AU - Erotokritou, Kleanthis

AU - Miki, Shigehito

AU - Yabuno, Masahiro

AU - Terai, Hirotaka

AU - Gawith, Corin

AU - Kues, Michael

AU - Caspani, Lucia

AU - Hadfield, Robert H.

AU - Clerici, Matteo

PY - 2020/3/27

Y1 - 2020/3/27

N2 - 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.

AB - 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.

KW - quantum-enhanced optical systems

KW - entangled photons

KW - two-photon interference

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VL - 6

JO - Science Advances

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IS - 13

M1 - eaay5195

ER -

Two-photon quantum interference and entanglement at 2.1 μm

Abstract

Keywords

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