title: Spatiotemporal antiphase dynamics in coupled extended optical media.
abstract: Experimental evidence of spatiotemporal antiphase dynamics is given for an extended system made of two liquid crystal slices that are optically coupled by two equal amplitude counterpropagating pumping beams. Theory and experiments carried out in a transverse one-dimensional configuration show that roll patterns are generated in each slice. These rolls are spatially in-phase or antiphase for a focusing or a defocusing nonlinearity type, respectively. These in-phase or antiphase dynamics remain robust even for complex spatiotemporal regimes such as dislocation regimes.
authors.affiliation: Laboratoire de Physique des Lasers, Atomes et Molécules, CERLA, Université des Sciences et Technologies de Lille, 59655 Villeneuve d'Ascq Cedex, France. eric.louvergneaux@univ-lille1.fr
authors.forename: E
authors.initials: E
authors.lastname: Louvergneaux
authors.forename: F
authors.initials: F
authors.lastname: Rogister
authors.forename: P
authors.initials: P
authors.lastname: Glorieux