Amplification of enhanced backscattering from a dye-doped polymer bounded by a rough surface

We report the experimental study of the enhanced backscattering fi om a ran dom rough surface through a laser dye-doped polymer. The sample is a slice of pyrromethene-doped polymer coupled with a two-dimensional rough gold lay er with a large slope. When the sample is illuminated with an s-polarized H e-Ne laser and pumped by a cw argon-ion laser, amplified backscattering is observed. The enhanced backscattering peak increases sharply and its width narrows for a sample with low dielectric constant \epsilon(2)\. (C) 2000 Op tical Society of America OCIS codes: 290.5880, 290.1350, 290.5820, 030.0030 .