Poling and Relaxation Dynamics of a Nonlinear Optical Polyimide: Temperature-Dependent SHG Study

Abstract

Abstract The temperature dependence of second harmonic generation efficiency have been studied to investigate the poling and relaxation dynamics of polyamic acid carrying two end-on attached chromophores of DR1 and DANS. We interpreted the experimental results with the free volume model and thermal orientation fluctuation of structural components such as the nonlinear optical chromophores and main chains.