0000000000422113

AUTHOR

Ulf Peschel

showing 2 related works from this author

Ising-Bloch transition in 2D degenerate wave mixing

2004

We show experimentally and theoretically the existence of a 2D Ising-Bloch transition in the field generated by degenerate four wave mixing in a BaTiO3-resonator.

PhysicsCondensed Matter::Materials ScienceFour-wave mixingField (physics)Cross-polarized wave generationQuantum mechanicsDegenerate energy levelsNonlinear opticsIsing modelPhysical opticsMixing (physics)Nonlinear Guided Waves and Their Applications
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Ising and Bloch walls of phase domains in two-dimensional parametric wave mixing

2004

Oscillators driven by a degenerate wave mixing process are bistable in the phase of the generated radiation. In systems with a large Fresnel number, domains of opposite phase form therefore spontaneously. A simple model predicts a real field in which phase domains are separated by Ising-type walls. In this paper we show experimentally (using complex field reconstruction from measurements) and theoretically (by an extended model) that the optical field can be real as well as complex valued and that complex field fronts are related to the front curvature.

PhysicsClassical mechanicsBistabilityQuantum mechanicsPhase (waves)Fresnel numberIsing modelOptical fieldCurvaturePhase conjugationAtomic and Molecular Physics and OpticsMixing (physics)Physical Review A
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