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Proceedings Paper

Polymer-dissolved liquid crystal composites for use in real-time holography
Author(s): Hiroshi Ono; Tomomi Kawamura; Hideki Norisada; Nobuhiro Kawatsuki
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Paper Abstract

Photorefractive polymer-dissolved liquid crystal composites (PDLCCs) were investigated for use in real time holography. Our photorefractive materials consist of a functionalized copolymer, low-molar-mass liquid crystal mixture (E7) and 2,4,7-trinitro-9-fruorenone (TNF) as a sensitizing dye. The copolymer consists of mesogenic 4-cyanobenzoate and N- carbazoyl side groups and made charge-transfer complexes by adding TNF molecules, which is favorable for photoconductive effects. Since the copolymer has mesogenic side groups, E7 can dissolve the copolymer without phase separation and the resulting PDLCCs show the mesophase. The holographic gratings were created by means of the frequency-doubled YAG laser (532 nm) and the diffracted intensity was monitored with the He-Ne laser (633 nm). The high diffraction efficiency of 39% was achieved with a grating constant of 2.6 micrometer and an applied dc field of 0.3 V/micrometer.

Paper Details

Date Published: 24 October 2000
PDF: 10 pages
Proc. SPIE 4107, Liquid Crystals IV, (24 October 2000); doi: 10.1117/12.405312
Show Author Affiliations
Hiroshi Ono, Nagaoka Univ. of Technology (Japan)
Tomomi Kawamura, Nagaoka Univ. of Technology (Japan)
Hideki Norisada, Himeji Institute of Technology (Japan)
Nobuhiro Kawatsuki, Himeji Institute of Technology (Japan)

Published in SPIE Proceedings Vol. 4107:
Liquid Crystals IV
Iam-Choon Khoo, Editor(s)

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