12 September 2013 Photorefractive effect in ferroelectric liquid crystals containing oligo-thiophene chiral compounds
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The photorefractive effect in photoconductive ferroelectric liquid crystals (FLCs) that contain oligo-thiophene chiral compounds was investigated. Ter-thiophene and quarto-thiophene compounds with chiral structures were chosen as the photoconductive chiral compounds and mixed with an achiral smectic C liquid crystal. The mixtures exhibit the ferroelectric chiral smectic C phase. The photorefractivity of the mixtures was investigated by two-beam coupling experiments. It was found that the FLCs containing the photoconductive chiral compound exhibit a large gain coefficient of over 990 cm-1 and a fast response time of 1.7 ms.
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Takeo Sasaki, Takeo Sasaki, Masashi Ikegami, Masashi Ikegami, Satoshi Kajikawa, Satoshi Kajikawa, Yumiko Naka, Yumiko Naka, "Photorefractive effect in ferroelectric liquid crystals containing oligo-thiophene chiral compounds", Proc. SPIE 8828, Liquid Crystals XVII, 882805 (12 September 2013); doi: 10.1117/12.2022580; https://doi.org/10.1117/12.2022580

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