Near perfect two-photon interference out of a down-converter on a silicon photonic chip

被引：14
作者：
Dalidet, Romain [1 ]
Mazeas, Florent [2 ]
Nitiss, Edgars [2 ]
Yakar, Ozan [2 ]
Stroganov, Anton [3 ]
Tanzilli, Sebastien [1 ]
Labonte, Laurent [1 ]
Bres, Camille-Sophie [2 ]
机构：
[1] Univ Cote dAzur, CNRS, Inst Phys Nice, F-06108 Nice 2, France
[2] Ecole Polytech Federate Lausanne, Photon Syst Lab PHOSL, CH-1015 Lausanne, Switzerland
[3] LIGENTEC SA, Lausanne, Switzerland
来源：
OPTICS EXPRESS | 2022年 / 30卷 / 07期
基金：
欧洲研究理事会;
关键词：
PAIR GENERATION; QUANTUM; ENTANGLEMENT;
D O I：
10.1364/OE.451621
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Integrated entangled photon-pair sources are key elements for enabling large-scale quantum photonic solutions and address the challenges of both scaling-up and stability. Here we report the first demonstration of an energy-time entangled photon-pair source based on spontaneous parametric down-conversion in silicon-based platform-stoichiometric silicon nitride (Si3N4)-through an optically induced second-order (chi((2))) nonlinearity, ensuring type-0 quasi-phase-matching of fundamental harmonic and its second-harmonic inside the waveguide. The developed source shows a coincidence-to-accidental ratio of 1635 for 8 mu W pump power. We report two-photon interference with remarkable near-perfect visibility of 99.36 +/- 1.94%, showing high-quality photonic entanglement without excess background noise. This opens a new horizon for quantum technologies requiring the integration of a large variety of building functionalities on a single chip. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
引用
收藏
页码：11298 / 11305
页数：8
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