Observation of one- and two-dimensional discrete surface spatial solitons

The recent theoretical predictions and experimental observations of discrete surface solitons propagating along the interface between a one- or two-dimensional continuous medium and a one- or two- dimensional waveguide array are reviewed. These discrete solitons were found in second order ( periodically poled lithium niobate) and third order nonlinear media, including AlGaAs, photorefractive media and glass, respectivel