Satellite peaks in the scattering of light from the two-dimensional   randomly rough surface of a dielectric film on a planar metal surface
  A nonperturbative, purely numerical, solution of the reduced Rayleigh equation for the scattering of p- and s-polarized light from a dielectric film with a two-dimensional randomly rough surface deposited on a planar metallic substrate, has been carried out. It is found that satellite peaks are present in the angular dependence of the elements of the mean differential reflection coefficient in addition to an enhanced backscattering peak. This result resolves a conflict between the results of earlier approximate theoretical studies of scattering from this system. 
Tor Nordam and Paul Anton Letnes and Ingve Simonsen and Alexei A.   Maradudin
physics.optics physics.comp-ph