A nonlinear integrated optical platform that allows the fabrication of waveguide circuits with different material com-position,and at small dimensions,offers advantages in terms of field enhancement and increased interaction length,thereby fa-cilitating the observation of nonlinear optics effects at a much lower power level.To enhance the nonlinearity of the convention-al waveguide structure,in this work,we propose and demonstrate a microstructured waveguide where silicon rich layer is em-bedded in the core of the conventional waveguide in order to increase its nonlinearity.By embedding a 20 nm thin film of silic-on nanocrystal(Si-nc),we achieve a twofold increase of the nonlinear parameter,y.The linear relationship between the four-wave mixing conversion efficiency and pump power reveals the negligible nonlinear absorption and small dispersion in the mi-cro-ring resonators.This simple approach of embedding an ultra-thin Si-nc layer into conventional high-index doped silica dra-matically increases its nonlinear performance,and could potentially find applications in all-optical processing functions.