Real-time dynamic hologram in photorefractive ferroelectric liquid crystal with two-beam coupling gain coefficient of over 800 cm–1 and response time of 8 ms

The photorefractive effect in photoconductive ferroelectric liquid crystals (FLCs) that contain photoconductive chiral compounds was investigated. Terthiophene compounds with chiral structure were chosen as the photoconductive chiral compounds and mixed with an achiral smectic C liquid crystal. The...

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Bibliographic Details
Published in:Applied physics letters 2013-02, Vol.102 (6)
Main Authors: Sasaki, Takeo, Ikegami, Masashi, Abe, Tatsuya, Miyazaki, Daisuke, Kajikawa, Satoshi, Naka, Yumiko
Format: Article
Language:English
Subjects:
Coefficients
Ferroelectric materials
Ferroelectricity
Gain
Holography
Joining
Liquid crystals
Response time
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Summary:The photorefractive effect in photoconductive ferroelectric liquid crystals (FLCs) that contain photoconductive chiral compounds was investigated. Terthiophene compounds with chiral structure were chosen as the photoconductive chiral compounds and mixed with an achiral smectic C liquid crystal. The mixture exhibited the ferroelectric chiral smectic C phase and photoconductivity. The photorefractivity of the mixture was investigated by two-beam coupling experiment. It was found that the FLC containing the photoconductive chiral compound exhibits a large gain coefficient of over 800 cm−1 and a fast response time of 8 ms. The high photorefractive performance was considered to be due to enhanced charge mobility.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4792735