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22 August 2020 Lattice orientation control of cholesteric blue phase and Its hologram application
Masanori Ozaki, SeongYong Cho, Hiroyuki Yoshida
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Proceedings Volume 11472, Liquid Crystals XXIV; 1147210 (2020) https://doi.org/10.1117/12.2570536
Event: SPIE Organic Photonics + Electronics, 2020, Online Only
Abstract
We have investigated the azimuthal orientation behavior of blue phase (BPI) lattice reoriented from the electrically unwound homeotropic state, and it was found that the azimuthal angle changes to align the [001] axis parallel to the easy axis on a unidirectionally orienting surface upon an electric filed treatment. By combining this effect with the Pancharatnam-Berry effect, we designed and demonstrated various holographic optical elements (HOEs) such as deflector, lens, and hologram by appropriately designing the distribution of lattice orientations. In contrast to cholesteric liquid crystals that show diminished circular polarization selectivity upon largely oblique incidence, we demonstrate that the BP-based HOEs maintain the circular polarization selectivity even for oblique light incidence, owing to the three-dimensional helical structure of the BP.
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Masanori Ozaki, SeongYong Cho, and Hiroyuki Yoshida "Lattice orientation control of cholesteric blue phase and Its hologram application", Proc. SPIE 11472, Liquid Crystals XXIV, 1147210 (22 August 2020); https://doi.org/10.1117/12.2570536
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KEYWORDS
Holograms
Holography applications
Holographic optical elements
Optical design
Polarization
Liquid crystals
Modulation
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