Dynamic amplification of light signals in photorefractive ferroelectric liquid crystals

Takeo Sasaki; Yumiko Naka

doi:10.1117/12.2061457

7 October 2014 Dynamic amplification of light signals in photorefractive ferroelectric liquid crystals

Takeo Sasaki, Yumiko Naka

Proceedings Volume 9181, Light Manipulating Organic Materials and Devices; 91810E (2014) https://doi.org/10.1117/12.2061457
Event: SPIE Organic Photonics + Electronics, 2014, San Diego, California, United States

Abstract

The photorefractive effect in ferroelectric liquid crystalline mixtures containing photoconductive chiral compounds was investigated. Ter-thiophene compounds with chiral structures were chosen as the photoconductive chiral compounds, and they were 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 ferroelectric liquid crystals containing the photoconductive chiral compound exhibit a large gain coefficient of over 1200 cm^-1 and a fast response time of 1 ms. Real-time dynamic amplification of an optical image signal of over 30 fps using the photorefractive ferroelectric liquid crystal was demonstrated.

Citation Download Citation

Takeo Sasaki and Yumiko Naka "Dynamic amplification of light signals in photorefractive ferroelectric liquid crystals", Proc. SPIE 9181, Light Manipulating Organic Materials and Devices, 91810E (7 October 2014); https://doi.org/10.1117/12.2061457

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