Studies on Relaxation Behavior of Corona Poled Aromatic Dipolar Molecules in aPolymer Matrix

摘要

A number of corona poled guest-host systems have been investigated to understandthe nature of interaction between the guest and the host molecules, the compatibility and relaxation behavior. This has been carried out by studying the relaxation response of the nonlinear optical effects. Styrene acrylonotrile co-polymer was found to be the ideal matrix studied, since the polymer itself relaxes slowly subsequent to poling and it accommodates a wide range of nonlinear optical molecules differing in molecular structure and polarity. Retention of the second-harmonic intensity has been emphasized as a measure of the relaxation and decay of the order parameters with time. Absorption characteristics of the poled and unpoled film are also described. (js)