Polymer-dissolved liquid crystal composites for use in real-time holography

Hiroshi Ono; Tomomi Kawamura; Hideki Norisada; Nobuhiro Kawatsuki

doi:10.1117/12.405312

24 October 2000 Polymer-dissolved liquid crystal composites for use in real-time holography

Hiroshi Ono, Tomomi Kawamura, Hideki Norisada, Nobuhiro Kawatsuki

Author Affiliations +

Proceedings Volume 4107, Liquid Crystals IV; (2000) https://doi.org/10.1117/12.405312
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

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.

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Hiroshi Ono, Tomomi Kawamura, Hideki Norisada, and Nobuhiro Kawatsuki "Polymer-dissolved liquid crystal composites for use in real-time holography", Proc. SPIE 4107, Liquid Crystals IV, (24 October 2000); https://doi.org/10.1117/12.405312

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