ENHANCED BACKSCATTERING FROM ONE-DIMENSIONAL DETERMINISTIC SURFACES

Up until now most experimental studies of the enhanced backscattering of light from rough surfaces have focused on randomly rough surfaces. We report observations of the enhanced backscattering of light from de terministic surfaces. Angular light-scattering measurements are presen ted for a deterministic one-dimensional metallic surface when the ligh t illuminates the rough surface from vacuum. We also present measureme nts for a deterministic dielectric sample consisting of a photoresist film with a rough dimensional interface deposited on a plane-parallel glass plate, illuminated through the glass substrate. Numerical simula tions of the problem that confirm the existence of backscattering effe cts by means of approximate models for the samples employed in the exp eriments are also presented. believed that the observed enhanced backs cattering is due to the constructive interference of multiply scattere d optical waves. (C) 1996 Optical Society of America.