Two-dimensional solitons in a quintic-septimal medium

We report an observation of spatial solitons in a medium managed to present fifth-seventh (focusing-defocusing) refractive nonlinearities with suppressed third-order nonlinearity. Propagation of two-dimensional bright spatial solitons for similar to 10 Rayleigh lengths was observed and characterized in a suspension of silver nanoparticles in acetone using the scattered light imaging method. Numerical calculations based on a nonlinear Schrodinger-type equation, including contributions up to the seventh-order susceptibility, were performed showing good agreement with the experimental results.