POLED POLYMERIC NONLINEAR OPTICAL MATERIALS

摘要

The synthesis of a nonlinear chromophoric co-monomer 3,5-diamino-4'-nitrodiphenylamine and use as a reactive component in combination with a bismaleimide monomer in an NLO-active polyimide matrix is disclosed. After concurrent corona or contact poling and thermal polymerization, thin films of theses chromophoric polyimides exhibit high second harmonic generation efficiencies and high DSC-determined glass transition temperatures. These poled polyimides also exhibit excellent SHG temporal stability, retaining 85-90 % of the initial second harmonic efficiency after more than one month in air at 85 DEG C.