y Two-photon quantum interference and entanglement at 2.1 μm

被引：38

作者：

Prabhakar, Shashi ^{[1
]}

Shields, Taylor ^{[1
]}

Dada, Adetunmise C. ^{[1
]}

Ebrahim, Mehdi ^{[1
]}

Taylor, Gregor G. ^{[1
]}

Morozov, Dmitry ^{[1
]}

Erotokritou, Kleanthis ^{[1
]}

Miki, Shigehito ^{[2
,3
]}

Yabuno, Masahiro ^{[2
]}

Terai, Hirotaka ^{[2
]}

Gawith, Corin ^{[4
,5
]}

Kues, Michael ^{[6
,7
]}

Caspani, Lucia ^{[8
]}

Hadfield, Robert H. ^{[1
]}

Clerici, Matteo ^{[1
]}

机构：

[1] Univ Glasgow, James Watt Sch Engn, Glasgow G12 8QQ, Lanark, Scotland

[2] Natl Inst Informat & Commun Technol, Adv ICT Res Inst, Nishi Ku, 588-2 Iwaoka, Kobe, Hyogo 6512492, Japan

[3] Kobe Univ, Grad Sch Engn, Fac Engn, Nada Ku, 1-1 Rokkodai Cho, Kobe, Hyogo 6570013, Japan

[4] Covesion Ltd, Premier Ctr, Unit A7,Premier Way, Romsey SO51 9DG, Hants, England

[5] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England

[6] Leibniz Univ Hannover, Hannover Ctr Opt Technol HOT, Hannover, Germany

[7] Cluster Excellence PhoenixD, Photon Opt & Engn Innovat Disciplines, Hannover, Germany

[8] Univ Strathclyde, Inst Photon, Dept Phys, Glasgow G1 1RD, Lanark, Scotland

来源：

SCIENCE ADVANCES | 2020年 / 6卷 / 13期

基金：

英国科研创新办公室; 英国工程与自然科学研究理事会; “创新英国”项目; 欧洲研究理事会;

关键词：

SINGLE-PHOTON DETECTORS; PAIRS; TIME;

D O I：

10.1126/sciadv.aay5195

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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.

引用

页数：7

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