Novel Photorefractive and Electro-Optic Polymers-Rational Designs, Synthesis and Mechanism
Final technical rept. 28 Feb 1996-1 Mar 1999
CHICAGO UNIV IL DEPT OF CHEMISTRY
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This report describes our effort in the past three years on synthesis and characterization of novel photorefractive polymer system. Two major systems were developed, one of which combined the ionic transition metal complexes and a conjugated polymer backbone bearing NLO chromophores to manifest large photorefractive effect. Another is a molecular material containing oligothiophene and a nonlinear optical NLO chromophore. A large net optical gain 200cm at a zero electric field was observed in the metal containing system. In the molecular system, a net optical gain of 83cm and a diffraction efficiency of nearly 40 were obtained in a film made from this molecule under an applied field of 706 kvcm. A fast response time of for the grating formation, 42 ms under 616 kvcm, was observed.
- Polymer Chemistry