par Hoyuelos, Miguel;Colet, Pere;Miguel, Maxi San;Walgraef, Daniel 
Référence Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 58, 3 SUPPL. A, page (2992-3007)
Publication Publié, 1998
Référence Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 58, 3 SUPPL. A, page (2992-3007)
Publication Publié, 1998
Article révisé par les pairs
| Résumé : | We study spatiotemporal pattern formation associated with the polarization degree of freedom of the electric field amplitude in a mean field model describing a Kerr medium in a cavity with flat mirrors and driven by a coherent plane-wave field. We consider linearly as well as elliptically polarized driving fields, and situations of self-focusing and self-defocusing. For the case of self-defocusing and a linearly polarized driving field, there is a stripe pattern orthogonally polarized to the driving field. Such a pattern changes into a hexagonal pattern for an elliptically polarized driving field. The range of driving intensities for which the pattern is formed shrinks to zero with increasing ellipticity. For the case of self-focusing, changing the driving field ellipticity leads from a linearly polarized hexagonal pattern (for linearly polarized driving) to a circularly polarized hexagonal pattern (for circularly polarized driving). Intermediate situations include a modified Hopf bifurcation at a finite wave number, leading to a time dependent pattern of deformed hexagons and a codimension 2 Turing-Hopf instability resulting in an elliptically polarized stationary hexagonal pattern. Our numerical observations of different spatiotemporal structures are described by appropriate model and amplitude equations. |
