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Proceedings Paper

High-birefringence dopants for use in ferroelectric and nematic liquid crystal mixtures
Author(s): Michael D. Wand; Rohini T. Vohra; William N. Thurmes; Kundalika M. More
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Paper Abstract

Ferroelectric smectic C* liquid crystals have been shown to exhibit high speed, electro-optic switching when incorporated into the surface stabilized ferroelectric liquid crystal (SSFLC) light valve. Certain applications utilizing IR modulation, waveguide, and phase modulation, and certain fiber-optic devices, can benefit from materials with a birefringence higher than that typically seen in FLC materials ((Delta) n approximately equals 0.15). A new class of compounds, the tolane cinnamates, was developed to help meet this need. These compounds combine a cinnamate moiety with the well known high birefringence tolane core, resulting in two improvements: first, the birefringence increases from 0.24 to 0.29; and second, the tolane cinnamate system is significantly more stable to UV light than the parent tolane system. The new materials show smectic C as well as nematic phases and demonstrate good compatibility with both nematic and FLC hosts.

Paper Details

Date Published: 24 April 1995
PDF: 6 pages
Proc. SPIE 2408, Liquid Crystal Materials, Devices, and Displays, (24 April 1995); doi: 10.1117/12.207523
Show Author Affiliations
Michael D. Wand, Displaytech, Inc. (United States)
Rohini T. Vohra, Displaytech, Inc. (United States)
William N. Thurmes, Displaytech, Inc. (United States)
Kundalika M. More, Displaytech, Inc. (United States)

Published in SPIE Proceedings Vol. 2408:
Liquid Crystal Materials, Devices, and Displays
Ranganathan Shashidhar; Uzi Efron, Editor(s)

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