Octupolar Films with Large Second Harmonic Generation and Electro-Optical Effects

Authors

  • Mi-Yun Jeong,

    Corresponding author
    1. Department of Physics and Research Institute of Natural Science, Gyeongsang National University, Jinju, 660-701, South Korea
    • Mi-Yun Jeong, Department of Physics and Research Institute of Natural Science, Gyeongsang National University, Jinju, 660-701, South Korea

      Sophie Brasselet, Institut Fresnel, CNRS, Université Aix Marseille III, Ecole Centrale de Marseille, Domaine Univ. St Jérôme, 13397 Marseille Cedex 20, France

      Bong Rae Cho, Department of Chemistry, Korea University, Anamdong, Seoul 136-701, South Korea.

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  • Sophie Brasselet,

    Corresponding author
    1. Institut Fresnel, CNRS, Université Aix Marseille III, Ecole Centrale de Marseille, Domaine Univ. St Jérôme, 13397 Marseille Cedex 20, France
    • Mi-Yun Jeong, Department of Physics and Research Institute of Natural Science, Gyeongsang National University, Jinju, 660-701, South Korea

      Sophie Brasselet, Institut Fresnel, CNRS, Université Aix Marseille III, Ecole Centrale de Marseille, Domaine Univ. St Jérôme, 13397 Marseille Cedex 20, France

      Bong Rae Cho, Department of Chemistry, Korea University, Anamdong, Seoul 136-701, South Korea.

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  • Tong-Kun Lim,

    1. Department of Physics, Korea University, Anamdong, Seoul 136-701, South Korea
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  • Bong Rae Cho

    Corresponding author
    1. Department of Chemistry, Korea University, Anamdong, Seoul 136-701, South Korea
    • Mi-Yun Jeong, Department of Physics and Research Institute of Natural Science, Gyeongsang National University, Jinju, 660-701, South Korea

      Sophie Brasselet, Institut Fresnel, CNRS, Université Aix Marseille III, Ecole Centrale de Marseille, Domaine Univ. St Jérôme, 13397 Marseille Cedex 20, France

      Bong Rae Cho, Department of Chemistry, Korea University, Anamdong, Seoul 136-701, South Korea.

    Search for more papers by this author

Abstract

Thin films that benefit from efficient octupolar molecular packing are prepared for second harmonic generation (SHG) and electro-optic (EO) applications. The films are composed of 1,3,5-tricyano-2, 4,6-tris(p-diethylaminostyryl)benzene (TTB) in a ploymethylmetacrylate (PMMA) matrix on aluminum/BK7 glass (Al/BK7) and polyimide/indium tin oxide (PI/ITO) substrates. Octupolar films prepared on both substrates display polycrystalline and cylindrical domains. The molecular orientation, SHG efficiencies, and EO coefficients of the crystalline domains are measured. In the cylinders, the molecular crystal planes are oriented perpendicularly to the major cylinder axis, whereas in the polycrystals, the planes are randomly oriented. While both structures exhibit high and stable SHG and EO efficiencies, the cylinders, in particular, exhibited a very large SHG, a large EO coefficient, and high thermal stability; these characteristics will be useful in second order nonlinear optical applications.

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