title: Interference of coherent polariton beams in microcavities: polarization-controlled optical gates.
abstract: We demonstrate, theoretically and experimentally, a polarization-controlled optical gate based on a degenerate polariton-polariton scattering process occurring in semiconductor microcavities. Because of the interference between coherent polaritons, this process is observed in the case of polaritons generated from two collinearly polarized coherent pump beams. On the contrary, if the beams are cross polarized, the scattering is suppressed.
authors.affiliation: Laboratoire Kastler Brossel, Université Paris 6, Ecole Normale Supérieure et CNRS, UPMC Case 74, 4 place Jussieu, 75252, Paris Cedex 05, France.
authors.forename: C
authors.initials: C
authors.lastname: Leyder
authors.forename: T C H
authors.initials: TC
authors.lastname: Liew
authors.forename: A V
authors.initials: AV
authors.lastname: Kavokin
authors.forename: I A
authors.initials: IA
authors.lastname: Shelykh
authors.forename: M
authors.initials: M
authors.lastname: Romanelli
authors.forename: J Ph
authors.initials: JP
authors.lastname: Karr
authors.forename: E
authors.initials: E
authors.lastname: Giacobino
authors.forename: A
authors.initials: A
authors.lastname: Bramati