Dielectric Study of a Photo-Ckosslinkable Nonlinear Optical Polymer

Abstract

Temperature and frequency dependent measurements are utilized to study the relaxation behavior of a photocrosslinking nonlinear optical (NLO) material based on a polyvinylcinnamate (PVCN) polymer matrix. 3-cinnamoyloxy-4-[4-(N, N-diethylamino)-2-cinnamoyloxy phenyl azo] nitrobenzene (CNNB-R) is used as a functionalized NLO active dye. Measurements of dielectric properties of PVCN doped with different levels of CNNB-R have been performed. NLO dye molecules were bonded to the host polymer by ultraviolet irradiation. Measurements were carried out from 50 to 200 °C and a frequency range of 30 Hz to 1 MHz. The effects of dye content and UV irradiation on the dielectric response are discussed.

A relaxation study of poled nonlinear optical polymers by infrared reflection-absorption spectroscopy

“…4 A current project in our laboratory involves dielectric measurements on poled NLO polymer thin films. 33 Polymers are spin-coated onto a metal surface first before constructing a sandwich structure needed for the measurement. We have adopted a similar sample geometry to perform the IR reflection-absorption spectroscopy.…”