Theoretical and experimental studies of photorefractivity in novel polymeric composites

Bogdan Swedek; Paras N. Prasad; Yiping Cui; Ning Cheng; Jaroslaw W. Zieba; Jeffrey Winiarz; Kie-Soo Kim

doi:10.1117/12.254234

15 October 1996 Theoretical and experimental studies of photorefractivity in novel polymeric composites

Bogdan Swedek; Paras N. Prasad; Yiping Cui; Ning Cheng; Jaroslaw W. Zieba; Jeffrey Winiarz; Kie-Soo Kim

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Proceedings Volume 2850, Organic Photorefractive Materials and Xerographic Photoreceptors; (1996) https://doi.org/10.1117/12.254234
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

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.

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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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