High-birefringence dopants for use in ferroelectric and nematic liquid crystal mixtures

Michael D. Wand; Rohini T. Vohra; William N. Thurmes; Kundalika M. More

doi:10.1117/12.207523

24 April 1995 High-birefringence dopants for use in ferroelectric and nematic liquid crystal mixtures

Michael D. Wand, Rohini T. Vohra, William N. Thurmes, Kundalika M. More

Proceedings Volume 2408, Liquid Crystal Materials, Devices, and Displays; (1995) https://doi.org/10.1117/12.207523
Event: IS&T/SPIE's Symposium on Electronic Imaging: Science and Technology, 1995, San Jose, CA, United States

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.

Citation Download Citation

Michael D. Wand, Rohini T. Vohra, William N. Thurmes, and Kundalika M. More "High-birefringence dopants for use in ferroelectric and nematic liquid crystal mixtures", Proc. SPIE 2408, Liquid Crystal Materials, Devices, and Displays, (24 April 1995); https://doi.org/10.1117/12.207523

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