Optically controlled flexodomains in chiral nematics
Abstract
Periodic flexoelectric domains (FDs) stimulated by both electric and optical fields were examined in a photosensitive chiral nematic liquid crystal. It was observed that the optical field is an excellent candidate to modulate the morphology and electric threshold voltage of FDs, by either an optically induced surface effect through photo-alignment or an optically induced bulk effect through the optical control of chirality. With preset spatial patterns of the optical field, proof-of-concept prototypes of ring-shaped and fan-shaped gratings were constructed, which can be used in encoders to measure the angle directly and precisely.
Article Details
Journal Info
Journal of Applied Physics
American Institute of Physics
Authors (11)
Weipeng Peng
School of Information Engineering, Guangdong University of Technology 1 , Guangzhou 510006,
Fei Liang
State Key Laboratory of Crystal Materials and Institute of Crystal Materials
Yangquan Liao
School of Information Engineering, Guangdong University of Technology 1 , Guangzhou 510006,
Hongzhen Jing
School of Information Engineering, Guangdong University of Technology 1 , Guangzhou 510006,
Ying Xiang
9Chongqing University Cancer Hospital, Chongqing, China
Péter Salamon
HUN-REN Wigner Research Centre for Physics 2 , P.O. Box 49, 1525 Budapest,
Nándor Éber
HUN-REN Wigner Research Centre for Physics 2 , P.O. Box 49, 1525 Budapest,
Ágnes Buka
HUN-REN Wigner Research Centre for Physics 2 , P.O. Box 49, 1525 Budapest,
Ling Wang
Nemanja Trišović
Faculty of Technology and Metallurgy, University of Belgrade 4 , Karnegijeva 4, 11120 Belgrade,
Huaiping Zhang
Varitronix (He Yuan) Display Technology Co. Ltd 5 , He Yuan 517000,