Department of Physics,Henan Normal University,Xinxiang 453007,China;
Henan Key Laboratory of Photovoltaic Materials,Xinxiang 453007,China;
Liquid Crystal Research Group of Toyama,Toyama 930-0862,Japan;
Liquid Crystal Research Group of Toyama,Toyama 930-0862,Japan;
Liquid Crystal Research Group of Toyama,Toyama 930-0862,Japan;