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5 October 2023 The structure transformation, deformation, and optical properties in chiral liquid crystal phases
Hui-Yu Chen, Fumito Araoka, Feng-Yu Chen, Jui Jiun Chen, Chun-Hsien Su, Nei-Jyun Wang, Kuan-Cheng Su, Ruo-Han Lin
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Proceedings Volume PC12658, Liquid Crystals XXVII; PC126580G (2023) https://doi.org/10.1117/12.2675466
Event: SPIE Organic Photonics + Electronics, 2023, San Diego, California, United States
Abstract
Chiral liquid crystal phases are fascinating materials with unique optical and structural properties that make them attractive for various technological applications. Understanding the mechanisms behind their structure transformation, deformation, and optical properties is crucial for their successful implementation in devices. Moreover, creating a mono-domain blue-phase liquid crystal is of great interest due to its potential for high-speed display applications. In this talk, I would like to introduce LC phases with periodic helical structures, induced by adding chiral molecules into the nematic phase. By changing the chirality and temperature, we can obtain one-dimensional and three-dimensional periodic helical structures. When the periodic helical structures and the wavelength of the incident light are satisfied with Braggs' reflection condition, the helical LCs reflect various visible colors. The attractive thing is that the reflection and of them can be tunable in many ways easily. For 3-D helical LC, called blue-phase liquid crystal, the tunable reflection band comes from the lattice deformation and matainsites transformation, checked by lattice diffraction.
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Hui-Yu Chen, Fumito Araoka, Feng-Yu Chen, Jui Jiun Chen, Chun-Hsien Su, Nei-Jyun Wang, Kuan-Cheng Su, and Ruo-Han Lin "The structure transformation, deformation, and optical properties in chiral liquid crystal phases", Proc. SPIE PC12658, Liquid Crystals XXVII, PC126580G (5 October 2023); https://doi.org/10.1117/12.2675466
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KEYWORDS
Liquid crystals
Deformation
Optical properties
Electric fields
Second harmonic generation
Scattering
Signal intensity
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