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Updated: Aug 4, 2026
Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
Published on: May 15, 2017
High diffraction efficiency and a quasi-permanent grating in photorefractive nematic liquid crystal at low
Yanbo Pei1, Fengfeng Yao, Chunfeng Hou
1Department of Applied Physics, Harbin Institute of Technology, Harbin 150001, China.
Abstract:
At a temperature lower than the melting point of pure pentyl-cyanobiphenyl liquid crystal (5CB) we studied the photorefractive effect of 5CB heavily doped with fullerene (C60) and obtained a diffraction efficiency of the photorefractive grating of more than 40%, which is more than twice as high as the best data reported to our knowledge. A quasi-permanent grating was observed with a diffraction efficiency of 11.2% after the grating was kept in the dark for a month.
