Abstract
Photorefractive, nonlinear optical, and photoelectric characteristics at 1064 nm are discussed in the case of composites of polyvinyl carbazole (PVC) and closed single-walled carbon nanotubes with an additive of a visible-range cyanine dye with high electron affinity. Photorefractive properties are due to carbon nanotubes that are simultaneously spectral sensitizers toward laser irradiation at 1064 nm and responsible for the third-order dielectric susceptibility. Introduction of the dye leads to an increase in the photorefractive two-beam amplification factor of the laser bean and a significant increase in the quantum efficiency of free hole formation in PVC, but also a decrease in the third-order susceptibility. The dye plays the role of a super-sensitizer. It probably limits charge recombination in geminal pairs photogenerated in the range of bright interference fringes.
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Original Russian Text © A.S. Laryushkin, A.D. Grishina, T.V. Krivenko, V.V. Savel’ev, R.W. Rychwalski, A. V. Vannikov, 2012, published in Fizikokhimiya Poverkhnosti i Zashchita Materialov, 2012, vol. 48, No. 2, pp. 171–178.
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Laryushkin, A.S., Grishina, A.D., Krivenko, T.V. et al. The effect of cyanine dyes on photorefractive properties of composites based on carbon nanotubes. Prot Met Phys Chem Surf 48, 191–198 (2012). https://doi.org/10.1134/S2070205112020104
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DOI: https://doi.org/10.1134/S2070205112020104