15 October 1996 Theoretical and experimental studies of photorefractivity in novel polymeric composites
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Abstract
We present results of temperature dependence studies of photorefractive effect in a polymeric composite PVK:TCP:C60:DEANST. At elevated temperature, decreased rigidity of the host matrix leading to increased orientational mobility of the second-order nonlinear chromophores results in enhanced photorefractive performance. Diffraction efficiency approaching 100% and enhanced two-beam coupling gain coefficients are reported. The influence of temperature on the speed of photorefractive response is measured and discussed. We also report on a novel photorefractive polymeric composite. A new chromophore, 4-[N-(2- hydroxyethyl)-N-(methyl)amino phenyl]-4'-(6-hydroxyhexyl sulfonyl)stilbene, abbreviated as APSS, possessing high transparency over a broad wavelength, is used together with a PVK:TCP:C60 matrix. This composite shows high photorefractive figures of merit at 488, 514.5 and 632.8 nm. Diffraction efficiencies up to 40%, as well as net two-beam coupling gains of 60 cm-1 have been achieved at these wavelengths.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Bogdan Swedek, Bogdan Swedek, Paras N. Prasad, Paras N. Prasad, Yiping Cui, Yiping Cui, Ning Cheng, Ning Cheng, Jaroslaw W. Zieba, Jaroslaw W. Zieba, Jeffrey Winiarz, Jeffrey Winiarz, Kie-Soo Kim, Kie-Soo Kim, } "Theoretical and experimental studies of photorefractivity in novel polymeric composites", Proc. SPIE 2850, Organic Photorefractive Materials and Xerographic Photoreceptors, (15 October 1996); doi: 10.1117/12.254234; https://doi.org/10.1117/12.254234
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