We present the experimental observation of scalar multipole solitons in highly nonlocal nonlinear media, including dipole, tripole, quadrupole, and necklace-type solitons, organized as arrays of out-of-phase bright spots. These complex solitons are metastable, but with a large parameters range where the instability is weak, permitting their experimental observation.
Rotschild, C., Segev, M., Xu, Z., Kartashov, Y.V., Torner, L., Cohen, O. Two-dimensional multi-pole solitons in nonlocal nonlinear media. "Optics letters", Octubre 2006, vol. 31, núm. 22, p. 3312-3314.