title: Bistability Controlled by Convection in a Pattern-Forming System.
abstract: We analyze the transition from convective to absolute dynamical instabilities in a nonlinear optical system forming patterns, i.e., a photorefractive crystal in a single feedback configuration. We demonstrate that the convective regime is directly related to the bistability area in which the homogeneous steady state coexists with a pattern solution. Outside this domain, the system exhibits either a homogeneous steady state or an absolute dynamical regime. We evidence that the bistability area can be greatly increased by adjusting the mirror tilt angle and/or by applying an external background illumination on the photorefractive crystal.
authors.affiliation: LMOPS, OPTEL Research Group, CentraleSupélec, Université Paris-Saclay, 57070 METZ, France.|LMOPS, CentraleSupélec, Université de Lorraine, 57070 METZ, France.
authors.forename: Nicolas
authors.initials: N
authors.lastname: Marsal
authors.affiliation: LMOPS, OPTEL Research Group, CentraleSupélec, Université Paris-Saclay, 57070 METZ, France.|LMOPS, CentraleSupélec, Université de Lorraine, 57070 METZ, France.
authors.forename: Lionel
authors.initials: L
authors.lastname: Weicker
authors.affiliation: LMOPS, OPTEL Research Group, CentraleSupélec, Université Paris-Saclay, 57070 METZ, France.|LMOPS, CentraleSupélec, Université de Lorraine, 57070 METZ, France.
authors.forename: Delphine
authors.initials: D
authors.lastname: Wolfersberger
authors.affiliation: LMOPS, OPTEL Research Group, CentraleSupélec, Université Paris-Saclay, 57070 METZ, France.|LMOPS, CentraleSupélec, Université de Lorraine, 57070 METZ, France.
authors.forename: Marc
authors.initials: M
authors.lastname: Sciamanna