Ring-substituted diphenyldiacetylenes for use in ferroelectric liquid crystal spatial light modulators

Michael D. Wand; Sean Monohan; David Liptak; Rohini T. Vohra

doi:10.1117/12.151225

13 August 1993 Ring-substituted diphenyldiacetylenes for use in ferroelectric liquid crystal spatial light modulators

Michael D. Wand, Sean Monohan, David Liptak, Rohini T. Vohra

Proceedings Volume 1911, Liquid Crystal Materials, Devices, and Applications II; (1993) https://doi.org/10.1117/12.151225
Event: IS&T/SPIE's Symposium on Electronic Imaging: Science and Technology, 1993, San Jose, CA, United States

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.

Citation Download Citation

Michael D. Wand, Sean Monohan, David Liptak, and Rohini T. Vohra "Ring-substituted diphenyldiacetylenes for use in ferroelectric liquid crystal spatial light modulators", Proc. SPIE 1911, Liquid Crystal Materials, Devices, and Applications II, (13 August 1993); https://doi.org/10.1117/12.151225

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