title: Generation of correlated photons in nanoscale silicon waveguides.
abstract: .We experimentally study the generation of correlated pairs of photons through four-wave mixing (FWM) in embedded silicon waveguides. The waveguides, which are designed to exhibit anomalous group-velocity dispersion at wavelengths near 1555 nm, allow phase matched FWM and thus efficient pair-wise generation of non-degenerate signal and idler photons. Photon counting measurements yield a coincidence-to-accidental ratio (CAR) of around 25 for a signal (idler) photon production rate of about 0.05 per pulse. We characterize the variation in CAR as a function of pump power and pump-to-sideband wavelength detuning. These measurements represent a first step towards the development of tools for quantum information processing which are based on CMOS-compatible, silicon-on-insulator technology.
authors.forename: Jay E
authors.initials: JE
authors.lastname: Sharping
authors.forename: Kim F
authors.initials: KF
authors.lastname: Lee
authors.forename: Mark A
authors.initials: MA
authors.lastname: Foster
authors.forename: Amy C
authors.initials: AC
authors.lastname: Turner
authors.forename: Bradley S
authors.initials: BS
authors.lastname: Schmidt
authors.forename: Michal
authors.initials: M
authors.lastname: Lipson
authors.forename: Alexander L
authors.initials: AL
authors.lastname: Gaeta
authors.forename: Prem
authors.initials: P
authors.lastname: Kumar