作者: N. Marsal , D. Wolfersberger , M. Sciamanna , G. Montemezzani
DOI: 10.1103/PHYSREVA.81.031804
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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.