title: Semiconductor waveguide source of counterpropagating twin photons.
abstract: We experimentally demonstrate an integrated semiconductor source of counterpropagating twin photons in the telecom range. A pump beam impinging on top of an AlGaAs waveguide generates parametrically two counterpropagating, orthogonally polarized signal/idler guided modes. A 2 mm long waveguide emits at room temperature one average photon pair per pump pulse, with a spectral linewidth of 0.15 nm. The twin character of the emitted photons is ascertained through a time-correlation measurement. This work opens a route towards new guided-wave semiconductor quantum devices.
authors.affiliation: Laboratoire Matériaux et Phénomènes Quantiques, UMR 7162, Université Paris 7-Denis Diderot, Case 7021, 2 Place Jussieu, 75251 Paris, France.
authors.forename: L
authors.initials: L
authors.lastname: Lanco
authors.forename: S
authors.initials: S
authors.lastname: Ducci
authors.forename: J-P
authors.initials: JP
authors.lastname: Likforman
authors.forename: X
authors.initials: X
authors.lastname: Marcadet
authors.forename: J A W
authors.initials: JA
authors.lastname: van Houwelingen
authors.forename: H
authors.initials: H
authors.lastname: Zbinden
authors.forename: G
authors.initials: G
authors.lastname: Leo
authors.forename: V
authors.initials: V
authors.lastname: Berger