Plasmonic nanoparticles (NPs) are emerging as a promising category of materials, which might find applications in optical storage of information, optical wave guiding, microelectronics, optical sensing and solar energy harvesting. We propose to study nanoparticles embedded into an AlN matrix, a promising dielectric matrix due to its transparency, inertness and hardness. By controlling the kinetics and energetics of Pulsed Laser Deposition (PLD) we managed to embed Ag nanospheres (diameter 3-3.5 nm) into AlN matrices following an almost cold process. The proposed SANS experiment will enable us to charachterise the size and distribution of the NPs within the matrix, which have been produced under different conditions (by laser annealing, at different energies and fluences). Unlike TEM, we will get an average over the whole processed sample.