A Silicon Source of Frequency-bin Entangled Photons

Federico Andrea Sabattoli;Linda Gianini;Angelica Simbula;Marco Clementi;Antonio Fincato;Frederic Boeuf;Marco Liscidini;Matteo Galli;Daniele Bajoni

2022-01-01

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Abstract

We demonstrate an integrated source of frequency-entangled photon pairs on a silicon photonics chip. The emitter has a coincidence-to-accidental ratio exceeding 103. We prove entanglement by showing two-photon frequency interference with a visibility of 94.6% ± 1.1%. This result opens the possibility of on-chip integration of frequency-bin sources with modulators and the other active and passive devices available in the silicon photonics platform.