Chielectric spectroscopy, which is frequency-domain electric-field-induced second-harmonic generation, was developed to study the nonlinear optical response near the glass-transition temperature on short time scales. These measurements, along with time-domain second-harmonic generation and time- and frequency-domain dielectric measurements, were used to characterize the decay of poling-induced electro-optic properties of guest–host and side-chain methacrylate polymers that have glass-transition temperatures in the range 90< T<sub>g</sub><125 °C. Time- and frequency-dependent data were fitted with a three-level model. The temperature dependences of the time constants from the polymeric systems were then compared, and a scaling model for predicting useful lifetimes of poled electro-optic media is discussed.
© 1998 Optical Society of America
(160.2100) Materials : Electro-optical materials
(160.4890) Materials : Organic materials
(160.5470) Materials : Polymers
(190.4710) Nonlinear optics : Optical nonlinearities in organic materials
(310.0310) Thin films : Thin films
R. D. Dureiko, D. E. Schuele, and K. D. Singer, "Modeling relaxation processes in poled electro-optic polymer films," J. Opt. Soc. Am. B 15, 338-350 (1998)