SECOND ORDER NONLINEAR OPTICAL MATERIAL AND METHOD FOR PRODUCING SECOND ORDER NONLINEAR OPTICAL DEVICE

摘要

An organic dye having a second order nonlinear optical effect or a polymer precursor having a side chain of an organic dye and a zol-gel liquid in which a metallic oxide precursor is dispersed are cast on a substrate to form a thin film. The thin film is irradiated with lights of different wavelengths coaxial at one time to conduct optical poling of a thin film under heat treatment or after treatment. The polarization of the organic dye is stably maintained over a long period of time, thereby providing a second order linear optical device preferable to, for example, an optical modulator and an optical switch.