1. National Laboratory of Solid State MicrostructuresKey Laboratory of Intelligent Optical Sensing and ManipulationCollaborative Innovation Center of Advanced Microstructures and College of Engineering and Applied SciencesNanjing University Nanjing 210093 China
2. Institute for Smart Liquid CrystalsJITRI Changshu 215500 China
3. Department of PhysicsEast China University of Science and Technology Shanghai 200237 China
4. Liquid Crystal Institute and Chemical Physics Interdisciplinary ProgramKent State University Kent OH 44242 USA