Xiang Ying, Liu Yi-Kun, Zhang Zhi-Yong, You Hong-Jun, Xia Tian, Wang Everett, Cheng Zheng-Dong
School of Information Engineering, Guangdong University of Technology, Guangzhou 510006, China.
Opt Express. 2013 Feb 11;21(3):3434-44. doi: 10.1364/OE.21.003434.
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.
