A New Approach to Design of Cross-Linked Second-Order Nonlinear Optical
Technical rept. no. 2, 1 Jun 1990-31 May 1991
LOWELL UNIV MA DEPT OF CHEMISTRY
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A new class of crosslinked second-order nonlinear optical NLO polymers has been developed by processing a NLO-dye and a polymer similar to conventional doped polymer system. Intermolecular crosslinking was carried out by UV radiation subsequent to electric field induced poling of the composite. Cinnamate C6H5-CHCH-CO2- and styrylacrylate C6H5-CHCH-CHCH-CO2- moieties are selected as the photoreactive chromophores which are attached to both the NLO molecules at two positions and randomly substituted to a vinyl polymer. The poled crosslinked polymers exhibit stable nonlinear activity over a long period of time as characterized by temporal response of second-harmonic generation signal and UV absorption characteristics.
- Polymer Chemistry