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Proceedings Paper

Ring-substituted diphenyldiacetylenes for use in ferroelectric liquid crystal spatial light modulators
Author(s): Michael D. Wand; Sean Monohan; David Liptak; Rohini T. Vohra
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Paper Abstract

Ferroelectric smectic C* liquid crystals have been shown to exhibit high speed, multistate electro-optic switching, particularly when incorporated into the surface stabilized ferroelectric liquid crystal (SSFLC) light valve. Certain applications utilizing IR modulation, waveguide, phase modulation, and fiber-optic devices can benefit from a birefringence higher than the value of (Delta) n equals 0.15 seen in typical FLC materials. By incorporating the highly conjugated diacetylene moiety into an FLC core, an increase in birefringence greater than (Delta) n equals 0.3 is achieved. Lateral fluorination of the core induces a strong preference for the tilted smectic C phase as compared to the unfluorinated materials which typically show the nematic phase. The effect of other substitutions is explored on the mesogenic properties of the basic core structure.

Paper Details

Date Published: 13 August 1993
PDF: 10 pages
Proc. SPIE 1911, Liquid Crystal Materials, Devices, and Applications II, (13 August 1993); doi: 10.1117/12.151225
Show Author Affiliations
Michael D. Wand, Displaytech, Inc. (United States)
Sean Monohan, Displaytech, Inc. (United States)
David Liptak, Displaytech, Inc. (United States)
Rohini T. Vohra, Displaytech, Inc. (United States)


Published in SPIE Proceedings Vol. 1911:
Liquid Crystal Materials, Devices, and Applications II
Uzi Efron; Michael D. Wand, Editor(s)

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