Thermally Stable and Resonance Enhanced Large Nonlinear Optical Properties in Poled Silica Films Doped with Thiazole Azo Dye

Abstract

Sol-gel processed poled silica films doped with novel nonlinear organic materials, thiazole azo dye (TA), are prepared in high concentration. Resonance enhanced second-order nonlinear optical coefficient of d₃₃=154 pm/V is obtained from TA doped silica film (40 wt%) for the fundamental wavelength of 1064 nm. The value d₃₃ is unvaried for at least 100 h under a high temperature condition (100°C) without any relaxation. Wave-length dependent second-order nonlinearity is also measured.