6533b7ddfe1ef96bd1274871
RESEARCH PRODUCT
Controlled Observation of a Nonequilibrium Ising-Bloch Transition in a Nonlinear Optical Cavity
Germa~¡n J. De ValcárcelAdolfo Esteban-martinVictor B. TaranenkoJavier GarciaEugenio Roldánsubject
PhysicsCondensed matter physicsBistabilityDegenerate energy levelsFOS: Physical sciencesGeneral Physics and AstronomyNon-equilibrium thermodynamicsNonlinear opticsPattern Formation and Solitons (nlin.PS)Photorefractive effectNonlinear Sciences - Pattern Formation and SolitonsPhysics::Accelerator PhysicsIsing modelPhase conjugationMixing (physics)Optics (physics.optics)Physics - Opticsdescription
We describe the controlled observation of the nonequilibrium Ising-Bloch transition in a broad area nonlinear optical cavity, namely, a quasi-1D single longitudinal-mode photorefractive oscilator in a degenerate four-wave mixing configuration. Our experimental technique allows for the controlled injection of the domain walls. We use cavity detuning as control parameter and find that both Ising and Bloch walls can exist for the same detuning values within a certain interval of detunings, i.e., the Ising-Bloch transition is hysteretic in our case. A complex Ginzburg-Landau model is used for supporting the observations.
year | journal | country | edition | language |
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2004-11-23 | Physical Review Letters |