title: Observation of the photorefractive effects in bent-core liquid crystals.
abstract: We present a new observation of photorefractive (PR) effects in bent-core nematic (BCN) liquid crystal (LC) materials, where two kinds of optical-induced gratings are demonstrated and compared in pure and surface-doped BCN systems. The experimental results showed that these two kinds of gratings exhibit distinctive different polarization-dependent and angular-dependent behaviors, respectively. Furthermore, we supplied the pure and surface-doped rodlike LC systems for comparison, which revealed that V shape molecular structure of BCN can produce charge carrier more efficiently than rodlike molecular structure does. Thus BCN materials can offer an exciting potential for optical information processing.
authors.affiliation: School of Information Engineering, Guangdong University of Technology, Guangzhou 510006, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Xiang
authors.forename: Yi-Kun
authors.initials: YK
authors.lastname: Liu
authors.forename: Zhi-Yong
authors.initials: ZY
authors.lastname: Zhang
authors.forename: Hong-Jun
authors.initials: HJ
authors.lastname: You
authors.forename: Tian
authors.initials: T
authors.lastname: Xia
authors.forename: Everett
authors.initials: E
authors.lastname: Wang
authors.forename: Zheng-Dong
authors.initials: ZD
authors.lastname: Cheng
mesh_terms: D055119:Elastic Modulus; D008027:Light; D050866:Liquid Crystals / Q000737:chemistry*; D012031:Refractometry / Q000379:methods*; D012542:Scattering, Radiation