title: High diffraction efficiency and a quasi-permanent grating in photorefractive nematic liquid crystal at low temperature.
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.
authors.affiliation: Department of Applied Physics, Harbin Institute of Technology, Harbin 150001, China.
authors.forename: Yanbo
authors.initials: Y
authors.lastname: Pei
authors.forename: Fengfeng
authors.initials: F
authors.lastname: Yao
authors.forename: Chunfeng
authors.initials: C
authors.lastname: Hou
authors.forename: Xiudong
authors.initials: X
authors.lastname: Sun
authors.forename: Zhongxiang
authors.initials: Z
authors.lastname: Zhou