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Symmetry-breaking instability of quadratic soliton bound states.

par Delque, Michaël ;Fanjoux, Gil;Maillotte, Hervé;Kockaert, Pascal ;Sylvestre, Thibaut ;Haelterman, Marc
Référence Physical Review A, 83, 1, page (013807)
Publication Publié, 2011-01-07

Article révisé par les pairs

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Résumé :

We study both numerically and experimentally two-dimensional soliton bound states in quadratic media and demonstrate their symmetry-breaking instability. The experiment is performed in a potassium titanyl phosphate crystal in a type-II configuration. The bound state is generated by the copropagation of the antisymmetric fundamental beam locked in phase with the symmetrical second harmonic one. Experimental results are in good agreement with numerical simulations of the nonlinear wave equations. © 2011 American Physical Society