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1 April 2020 Effect of chiral concentration of chiral smectic C liquid crystal mixture on the photorefractive property
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Abstract
The effect of the concentration of chiral compound on the photorefractive effect of smectic liquid crystal blends containing small amounts of a chiral compound was investigated. Photorefractive ferroelectric liquid crystal blends, composed of smectic-C liquid crystals, photoconductive chiral compounds and a sensitizer, are known to exhibit a large photorefractive effect. Smectic liquid crystal blends containing various concentrations of a chiral compound while keeping a constant concentration of photoconductive moiety were prepared. The effect of the concentration of the chiral compound on the photorefractive properties of the liquid crystal blend was investigated. It was found that smectic-C liquid crystals containing small amounts of chiral compound showed a large photorefractivity even though they did not exhibit ferroelectricity. The large photorefractivity of the chiral smectic-C phase was attributed to an apearance of the flexoelectric effect.
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Takeo Sasaki "Effect of chiral concentration of chiral smectic C liquid crystal mixture on the photorefractive property", Proc. SPIE 11367, Photosensitive Materials and their Applications, 113670V (1 April 2020); https://doi.org/10.1117/12.2554925
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