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20 August 2020 Nonlinear optics with heliconical cholesterics
Francesco Simoni
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Proceedings Volume 11472, Liquid Crystals XXIV; 1147207 (2020) https://doi.org/10.1117/12.2567497
Event: SPIE Organic Photonics + Electronics, 2020, Online Only
Abstract
In this lecture we describe the interaction between a laser beam and the helical structure of the heliconical cholesteric phase. We show that strong optical reorientation is possible in this case differently from planar cholesterics where the observation orientational optical nonlinearities are prevented by the helical structure. The key factor allowing the efficient coupling between the optical field and the liquid crystal director is the bend distortion of the heliconical phase, that can be easily modulated by the light beam. We discuss here and present the most recent results related to light induced pitch tuning and optical modulation of light polarization in heliconical cholesterics.
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Francesco Simoni "Nonlinear optics with heliconical cholesterics", Proc. SPIE 11472, Liquid Crystals XXIV, 1147207 (20 August 2020); https://doi.org/10.1117/12.2567497
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KEYWORDS
Nonlinear optics
Liquid crystals
Modulation
Molecular interactions
Polarization
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