Nonlinear optical material, process of production of same, and nonlinear optical device and directional coupling type optical switch using same

摘要

A nonlinear optical material composed of a polyimide obtained from a diamine and/or a diacid anhydride or dithioacid anhydride substituted by a portion having a nonlinear optical effect or of molecules having a benzocyclobutene structure substituted at the portions having an nonlinear linear optical effect.