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Electro-optical and pyroelectrical thermal analysis of novel nonlinear optical side-chain polymers with high thermal stability


Lessard, R.A. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Photopolymers and applications in holography, optical data storage, optical sensors, and interconnects : 16-18 August 1993, Québec, Canada
Bellingham/Wash.: SPIE, 1994 (SPIE Proceedings Series 2042)
ISBN: 0-8194-1301-1
Conference "Photopolymers and Applications in Holography, Optical Data Storage, Optical Sensors, and Interconnects" <1993, Quebec>
Conference Paper
Fraunhofer HHI ()
electro-optical effects; nonlinear optical susceptibility; optical harmonic generation; optical polymers; polymer blends; polymer films; pyroelectricity; thermal analysis; nonlinear optical polymers; optimal poling; shg; azo dyes; electro-optical thermal analysis; pyroelectrical thermal analysis; high thermal stability; maleic anhydride copolymers; esterification; amidization; imidization; side-chain polymers; spin-coated; electro-optical activity

Polymers containing nonlinear optical moieties were prepared on the basis of maleic anhydride copolymers. Azo dyes such as Disperse Red 1 (DR 1) were attached to the polymer backbones via esterification, amidization, or imidization. Optimal poling conditions for the side-chain polymers were determined. After electrode poling with a bias voltage of 200 V at a temperature of 185 degrees C, the spin-coated samples were slowly cooled down to room temperature with the poling field still applied. The thermal stabilities of the poled polymer films were measured by means of electro-optical (EOTA) and pyroelectrical (PTA) thermal analysis and compared to the respective responses of DR 1/polymethylmethacrylate (PMMA) guest/host polymer samples. Both experimental techniques (EOTA and PTA) are discussed together with the experimental results. An electro-optical r33 coefficient of approximately 6 pm/V was achieved at a wavelength of 780 nm for one of the side-chain polymers, and the electro-optical activity decreased only at temperatures above 150 degrees C.