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Proceedings Paper

Orientational photorefractivity in C60-doped liquid crystals injected at nematic phase
Author(s): Hyun-Wuk Kim; Wook Min; Suho Jung; Choon-Sup Yoon; Jong-Duk Kim
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Paper Abstract

The optical responses and orientational photorefractives of nematic liquid crystals doped with fullerene were investigated with layer structures in cells. Nematic liquid crystals injected at isotropic phase suffer optical losses due to undesirable light scattering and the switching disorder of liquid crystals under applied voltages, which can lower the photorefractive effects. However, when nematic liquid crystals are injected at a nematic phase, the better cell texture can be obtained due to the flow-induced orientation effect. Sample with this method showed much higher photorefractive effects than that injected at an isotropic phase, because the molecular ordering of liquid crystals highly influences the orientational photorefractive effects. As the temperature at injection state changes, the molecular ordering of liquid crystals may also change. Therefore, through the quantitative analysis of molecular ordering, it was believed that the temperature at an injection state could determine the molecular ordering and in fact, the photorefractive effect.

Paper Details

Date Published: 5 November 2002
PDF: 8 pages
Proc. SPIE 4802, Organic Photorefractive and Photosensitive Materials for Holographic Applications, (5 November 2002); doi: 10.1117/12.452445
Show Author Affiliations
Hyun-Wuk Kim, Korea Advanced Institute of Science & Technology (South Korea)
Wook Min, Korea Advanced Institute of Science & Technology (South Korea)
Suho Jung, Korea Advanced Institute of Science & Technology (South Korea)
Choon-Sup Yoon, Korea Advanced Institute of Science & Technology (South Korea)
Jong-Duk Kim, Korea Advanced Institute of Science & Technology (South Korea)


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

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