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Publications [#61546] of Robert D Guenther

Papers Published

  1. Iam Choon Khoo and Min-Yi Shih and Wood, M.V. and Guenther, B.D. and Pao Hsu Chen and Simoni, F. and Slussarenko, S.S. and Francescangeli, O. and Lucchetti, L., Dye-doped photorefractive liquid crystals for dynamic and storage holographic grating formation and spatial light modulation, Proc. IEEE (USA), vol. 87 no. 11 (1999), pp. 1897 - 911 [5.796353]
    (last updated on 2007/04/12)

    Abstract:
    The basic mechanisms of photo-induced space charge field formation, director axis re-orientation, and refractive index changes in fullerene C60- and dye-doped nematic liquid crystals films are presented. In particular, in aligned methyl-red-doped nematic liquid crystal film, we observe a nonlinear index change coefficient as high as 10 cm2/W, associated with purely optically induced liquid crystal director axis re-orientation. Experimental observations of dynamic and high-resolution storage holographic grating formation, two beam coupling with gain of nearly 3000 cm-1, optical limiting action at nanowatt cw laser power, and incoherent-coherent image conversion at μW/cm2 light intensity level are discussed

    Keywords:
    dyes;holographic gratings;holographic storage;liquid crystal devices;multiwave mixing;nematic liquid crystals;optical films;refractive index;space charge;spatial light modulators;


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