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Proceedings Paper

Spontaneous polarization reorientation photorefractive effect in ferroelectric liquid crystals
Author(s): Takeo Sasaki; Atsushi Katsuragi; Yukihito Nakazawa; Godai Fukunaga; Shintaro Yoshimura
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Paper Abstract

The photorefractive effect of a series of low-molecular-weight ferroelectric liquid crystals (FLCs) doped with photoconductive compounds was investigated using two-beam coupling experiments. Asymmetric energy exchange was observed only in the ferroelectric phase, and the refractive phase, and the refractive index formation time was found to be ~30 ms, which is faster than that of nematic photorefractive LCs. These results indicate that the mechanism of the photorefractive effect in FLCs is different from that in nematic LCs. The photorefractivity of a photoconductive polymer and FLC mixture was also investigated, and the effects of temperature, the strength of the applied electric field and spontaneous polarization on the diffraction efficiency were examined.

Paper Details

Date Published: 5 November 2002
PDF: 11 pages
Proc. SPIE 4802, Organic Photorefractive and Photosensitive Materials for Holographic Applications, (5 November 2002); doi: 10.1117/12.452423
Show Author Affiliations
Takeo Sasaki, Tokyo Univ. of Science (Japan)
Atsushi Katsuragi, Tokyo Univ. of Science (Japan)
Yukihito Nakazawa, Tokyo Univ. of Science (Japan)
Godai Fukunaga, Tokyo Univ. of Science (Japan)
Shintaro Yoshimura, Tokyo Univ. of Science (Japan)

Published in SPIE Proceedings Vol. 4802:
Organic Photorefractive and Photosensitive Materials for Holographic Applications
Klaus Meerholz, Editor(s)

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