Raman spectroscopy of chalcogenide thin films prepared by PLD

Before Ag doping, binary films exhibited Ge-Se corner-sharing tetrahedra modes at 190 cm−1, low scattering from edge-sharing tetrahedra at 210 cm−1, and Se chains at 260 cm−1 (stretching mode). However, after the diffusion process was complete, we observed an intensity reduction of bands centered at 210 cm−1 and 260 cm−1. The spectra of the photo-diffused films were similar to those of films deposited using a ternary target. Relaxation effects in binary glasses were also analyzed. Results were compared with those of other authors.