title: Correlated photon pair generation in AlGaAs nanowaveguides via spontaneous four-wave mixing.
abstract: We demonstrate a source of correlated photon pairs which will have applications in future integrated quantum photonic circuits. The source utilizes spontaneous four-wave mixing (SFWM) in a dispersion-engineered nanowaveguide made of AlGaAs, which has merits of negligible two-photon absorption and low spontaneous Raman scattering (SpRS). We observe a coincidence-to-accidental (CAR) ratio up to 177, mainly limited by propagation losses. Experimental results agree well with theoretical predictions of the SFWM photon pair generation and the SpRS noise photon generation. We also study the effects from the SpRS, propagation losses, and waveguide lengths on the quality of our source.
authors.forename: Pisek
authors.initials: P
authors.lastname: Kultavewuti
authors.forename: Eric Y
authors.initials: EY
authors.lastname: Zhu
authors.forename: Li
authors.initials: L
authors.lastname: Qian
authors.forename: Vincenzo
authors.initials: V
authors.lastname: Pusino
authors.forename: Marc
authors.initials: M
authors.lastname: Sorel
authors.forename: J
authors.initials: J
authors.lastname: Stewart Aitchison