Abstract
Aromatic main chain polyesters with perpendicularly attached nonlinear optical chromophores embedded in long alkoxy side chains are synthesized starting from 4,7-dihydroxy-2-(dicyanomethylene)-1,3-benzodithiolane. The polymers were characterized by DSC, XRD and polarized optical microscopy. Nonlinear optical properties of models of the chromophore subunits were investigated separately by electric field induced second harmonic generation (EFISH) and electrooptical absorption measurement (EOAM). Electric poling of the polymers was successfully applied to thin films of the polymer to induce the noncentrosymmetry required for second-order nonlinearity. Characterization of electrooptical properties of the poled polymer films was accomplished by the method of attenuated total reflection
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