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Proceedings Paper

Dynamic amplification of light signals in photorefractive ferroelectric liquid crystals
Author(s): Takeo Sasaki; Yumiko Naka
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Paper 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.

Paper Details

Date Published: 7 October 2014
PDF: 9 pages
Proc. SPIE 9181, Light Manipulating Organic Materials and Devices, 91810E (7 October 2014); doi: 10.1117/12.2061457
Show Author Affiliations
Takeo Sasaki, Tokyo Univ. of Science (Japan)
Yumiko Naka, Tokyo Univ. of Science (Japan)


Published in SPIE Proceedings Vol. 9181:
Light Manipulating Organic Materials and Devices
Jean-Michel Nunzi, Editor(s)

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