title: Ultra-low power generation of twin photons in a compact silicon ring resonator.
abstract: We demonstrate efficient generation of correlated photon pairs by spontaneous four wave mixing in a 5 μm radius silicon ring resonator in the telecom band around 1550 nm. By optically pumping our device with a 200 μW continuous wave laser, we obtain a pair generation rate of 0.2 MHz and demonstrate photon time correlations with a coincidence-to-accidental ratio as high as 250. The results are in good agreement with theoretical predictions and show the potential of silicon micro-ring resonators as room temperature sources for integrated quantum optics applications.
authors.affiliation: Dipartimento di Fisica, Università degli Studi di Pavia, via Bassi 6, Pavia, Italy.
authors.forename: Stefano
authors.initials: S
authors.lastname: Azzini
authors.forename: Davide
authors.initials: D
authors.lastname: Grassani
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Strain
authors.forename: Marc
authors.initials: M
authors.lastname: Sorel
authors.forename: L G
authors.initials: LG
authors.lastname: Helt
authors.forename: J E
authors.initials: JE
authors.lastname: Sipe
authors.forename: Marco
authors.initials: M
authors.lastname: Liscidini
authors.forename: Matteo
authors.initials: M
authors.lastname: Galli
authors.forename: Daniele
authors.initials: D
authors.lastname: Bajoni
mesh_terms: D011211:Electric Power Supplies; D004867:Equipment Design; D019544:Equipment Failure Analysis; D053844:Lasers, Solid-State; D008029:Lighting / Q000295:instrumentation*; D017785:Photons; D012825:Silicon / Q000737:chemistry* / Q000528:radiation effects
chemical_list: D012825:Silicon