Photorefractive effect in ferroelectric liquid crystals containing oligo-thiophene chiral compounds

Takeo Sasaki; Masashi Ikegami; Satoshi Kajikawa; Yumiko Naka

doi:10.1117/12.2022580

12 September 2013 Photorefractive effect in ferroelectric liquid crystals containing oligo-thiophene chiral compounds

Takeo Sasaki, Masashi Ikegami, Satoshi Kajikawa, Yumiko Naka

Proceedings Volume 8828, Liquid Crystals XVII; 882805 (2013) https://doi.org/10.1117/12.2022580
Event: SPIE Organic Photonics + Electronics, 2013, San Diego, California, United States

Abstract

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.

Citation Download Citation

Takeo Sasaki, Masashi Ikegami, Satoshi Kajikawa, and Yumiko Naka "Photorefractive effect in ferroelectric liquid crystals containing oligo-thiophene chiral compounds", Proc. SPIE 8828, Liquid Crystals XVII, 882805 (12 September 2013); https://doi.org/10.1117/12.2022580

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