The study of robust soliton clusters for light beams propagation in a media with competing cubic and quintic nonlinearities was presented. On the basis of an effective interaction potential, semianalytical predictions for the existence of quasistable necklace structures were proposed. The direct simulation study show that a necklace maintained its shape, when the initial pattern was close to the equilibrium size predicted by the potential. The obtained results suggested that combination of competing self-focusing and self-defocusing nonlinearities enhanced the robustness of both the vortex solitons and vorticity-carrying necklace patterns.
|Number of pages||8|
|Journal||Physical Review E - Statistical, Nonlinear, and Soft Matter Physics|
|Issue number||4 2|
|State||Published - Oct 2003|