Phase-matched second-harmonic generation in azodye-doped polymer films by nonresonant all-optical poling

摘要

Phase-matched second-harmonic generation (SHG) in azodye-doped polymer films was demonstrated using the nonresonant optical poling technique. A quadratic dependence of SHG on the film thickness and a relaxation retardation effect of the photoinduced χ~((2)) were observed in the films. The SHG conversion efficiency of a 105-μm thick film was estimated to be about 2%.