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Liquid Crystals Volume 35, 2008 - Issue 5
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Original Articles

Rotation of director during holographic recording in polymer‐dispersed liquid crystals

Hiroshi Ono Department of Electrical Engineering, Nagaoka University of Technology, 1603‐1 Kamitomioka, Nagaoka 940‐2188, JapanCorrespondence[email protected]
,
Najmiah Radiah Binti Mohamad Department of Electrical Engineering, Nagaoka University of Technology, 1603‐1 Kamitomioka, Nagaoka 940‐2188, Japan
,
Tomoyoki Sasaki Department of Electrical Engineering, Nagaoka University of Technology, 1603‐1 Kamitomioka, Nagaoka 940‐2188, Japan
,
Nobuhiro Kawatsuki Department of Material Science and Technology, University of Hyogo, 2167 Shosha, Himeji 671‐2201, Japan
&
Akifumi Ogiwara Department of Electrical and Computer Engineering, Takamatsu National College of Technology, 355 Chokusi, Takamatsu, 761‐8058, Japan
Pages 633-639 | Received 05 Feb 2008, Accepted 12 Mar 2008, Published online: 19 Jun 2008
 
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Abstract

The formation of holographic polymer‐dispersed liquid crystals was investigated in detail. The director was found to rotate during holographic recording owing to the change in morphology and migration of liquid crystals. A strongly anisotropic grating was constructed with variable diffraction efficiency that can be controlled by applying an analogue voltage to the nematic liquid crystal. Effects of post‐curing on electro‐optical properties were also investigated and the switching characteristics were strongly affected by the intermediate layer between the polymer and liquid crystal.

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