Details

Autor(en) / Beteiligte

• Dalidet, Romain
• Mazeas, Florent
• Nitiss, Edgars
• Yakar, Ozan
• Stroganov, Anton
• Tanzilli, Sébastien
• Labonté, Laurent
• Brès, Camille-Sophie

Titel

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

Ist Teil von

• Optics express, 2022-03, Vol.30 (7), p.11298-11305

Ort / Verlag

United States

Erscheinungsjahr

2022

Link zum Volltext

Quelle

EZB Free E-Journals

Beschreibungen/Notizen

• 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 (Si N )-through an optically induced second-order (χ ) 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 µW 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.