23 October 1998 Synthesis and characterization of novel photorefractive low molecular weight glasses
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Seven novel photorefractive glasses have been prepared in an effective four-step synthesis. The low molar mass glasses consist of a triphenylamine-core substituted with two carbazole moieties and a NLO-chromophore (NLO-DCTAs). In a second series of compounds (NLO-DATAs) the carbazole groups are replaced by diphenylamine. The compounds from stable glasses with Tgs of about 120 degrees C and 85 degrees C. The photorefractive properties such as the diffraction efficiency (eta) , the modulation amplitude of the refractive index (Delta) n, and the gain coefficient (Gamma) were determined by means of degenerate four-wave mixing and two- beam coupling experiments. We observed diffraction efficiencies of (eta) equals 90 cm-1. The samples have excellent properties with respect to optical quality and shelf-lifetime.
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Christoph Hohle, Christoph Hohle, Peter Strohriegl, Peter Strohriegl, Stefan Schloter, Stefan Schloter, Uwe Hofmann, Uwe Hofmann, Dietrich Haarer, Dietrich Haarer, } "Synthesis and characterization of novel photorefractive low molecular weight glasses", Proc. SPIE 3471, Xerographic Photoreceptors and Organic Photorefractive Materials IV, (23 October 1998); doi: 10.1117/12.328172; https://doi.org/10.1117/12.328172


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