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Optical second-harmonic generation in ferroelectric chiral smectic polysiloxane

  • Liquid-Crystal Nonlinear Optics
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Abstract

The second-order nonlinear optical properties of ferroelectric liquid crystalline polymer have been studied. Angular phase-matched Second-Harmonic Generation (SHG) is observed in the chiral smectic C (SmC*) phase of siloxane copolymer with chiral mesogen in the side chain. The effective nonlinear optical coefficient deff under the phase-matching condition is determined. The intense SHG is observed even in the crystalline phase by cooling down from the SmC* phase under the electric field. The effective coefficient of SHG in the crystalline phase is more than ten times larger than that of the phase-matched SHG in the SmC* phase. The enhancement of SHG in the crystalline phase is observed only in a homeotropically aligned cell and maintained even in the non-biased state for at least several days. The angular dependence of the SHG in the crystalline phase is confirmed.

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Authors and Affiliations

  1. Department of Electronic Engineering, Faculty of Engineering, Osaka University, 2-1 Yamada-Oka, 565, Suita, Osaka, Japan

    M. Ozaki, M. Sakuta & K. Yoshino

  2. Department of Polymer Technology, Chalmers University of Technology, S-41296, Göteborg, Sweden

    B. Helgee & M. Svensson

  3. Physics Department, Chalmers University of Technology, S-41296, Göteborg, Sweden

    K. Skarp

Authors
  1. M. Ozaki
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  2. M. Sakuta
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  3. K. Yoshino
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  4. B. Helgee
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  5. M. Svensson
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Ozaki, M., Sakuta, M., Yoshino, K. et al. Optical second-harmonic generation in ferroelectric chiral smectic polysiloxane. Appl. Phys. B 59, 601–606 (1994). https://doi.org/10.1007/BF01081180

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  • DOI: https://doi.org/10.1007/BF01081180

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