Influence of detector distance and surface length on the enhanced backscattering effect

Results of numerical simulations are presented for the problem of reflectio n of an incident plane wa wave from a randomly rough surface when the detec tor is at a finite distance. In particular, the effect of changes in the de tector distance on the enhanced backscatter effect is investigated. It is f ound that the enhanced backscatter peak reduces in size and becomes wider a s the detector distance is reduced in agreement with a simple expression fo r the phase difference between the rays multiply scattered from a valley on the surface.