Noise- and dynamics-sustained patterns in a nonlinear photorefractive system

作者: N. Marsal , D. Wolfersberger , M. Sciamanna , G. Montemezzani

DOI: 10.1103/PHYSREVA.81.031804

关键词:

摘要: We analyze experimentally the dynamics of optical patterns emerging from a photorefractive two-wave mixing geometry where tilted single-feedback mirror generates an advectionlike effect. Depending on nonlocal coupling (introduced by tilting angle) between two counterpropagating beams, strength response nonlinear bulk medium, and distance crystal, we observe initiation different pattern geometries, inversion transverse phase velocity, bifurcation convective to absolute instabilities.

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