Polymers and organic-inorganic hybrids for second-order nonlinear optics

摘要

Poled nonlinear optical (NLO) polymers have been the great interest for photonics applications. Using such materials, electro-optic modulators with a 100 GHz bandwidth have already been realized at the laboratory level, and a number of passive and active photonic devices also successfully fabricated. From the beginning stage of the NLO polymeric materials research in the middle of 1980's, thermal relaxation and low values of NLO coefficients to chromophores in these systems were the major obstacles for practical applications. Since then there have been continuous efforts toward reducing thermal relaxation and increasing NLO activity of the materials. In recent years, in addition to improving these two fundamental factors, research was also extended to enhance optical quality, processibility and chemical stability of NLO materials, which are the properties closely related to those of matrix polymers.