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4 March 2019 Tunable holographic gratings based on cross-linked liquid-crystalline polymers in nematic liquid crystals (Conference Presentation)
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Abstract
Holographic reflection gratings formed by photopolymerization of low concentrations of liquid crystal monomers in nematic liquids demonstrate greater than 150nm of red tuning when a direct current (DC) field is applied across standard liquid crystal cell. The band position is restored when the field is removed. Diffraction efficiencies are both polarization and temperature polarization dependent. Samples are prepared using various LC mixtures, formulated from 2wt% photoinitiator, 5~20 wt% liquid crystal monomers and positive dielectric anisotropy liquid crystals. The basic tuning mechanism will be discussed, along with electric field, temperature effects on the optical performance.
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© (2019) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Kyung Min Lee, Vincent P. Tondiglia, Timothy J. Bunning, Timothy J. White, and Michael E. McConney "Tunable holographic gratings based on cross-linked liquid-crystalline polymers in nematic liquid crystals (Conference Presentation)", Proc. SPIE 10944, Practical Holography XXXIII: Displays, Materials, and Applications, 1094406 (4 March 2019); https://doi.org/10.1117/12.2510438
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