Influences of the surface elastic energy term K13 on the critical fields of liquid crystal cells and experimental measurement of K13
Guan Rong-Hua (关荣华)a, Wang Chui-Ru (王翠茹)b, Yu Hui (于慧)c, Kang Wen-Xiu (康文秀)a, Huai Jun-Xia (淮俊霞)c, Yang Guo-Chen (杨国琛)c
a Department of Applied Physics, North China Electric Power University, Baoding 071003, China; b College of Computer Science and Technology, North China Electric Power University, Baoding 071003, China; c Institute of Physics, Hebei University of Technology, Tianjin 300130, China
Abstract Based on the modified formula of Rapini—Papoular, the equation and boundary condition of the director of weak anchoring nematic liquid crystal (NLC) cell have been obtained in the case of existence of the surface elastic energy term K13. The influences of K13 on the threshold field and the saturation field have been studied in detail with the methods of analytical derivation and numerical calculation. A new method of checking whether K13 exists or not is given in theory. Combining with the previous work, we also propose an experimental plan to measure the value of K13 with a wedge-shaped planar-aligned weak anchoring NLC cell. The numerical experiments are carried out to verify the feasibility of our method.
Received: 07 April 2004
Revised: 27 September 2004
Accepted manuscript online:
(Experimental determinations of smectic, nematic, cholesteric, and other structures)
Fund: Project supported by the Theoretical Physics Special Foundation of the National Natural Science of China (Grant No 10447107), and the Doctoral Foundation of North China Electric Power University, China (Grant No 20041210).
Cite this article:
Guan Rong-Hua (关荣华), Wang Chui-Ru (王翠茹), Yu Hui (于慧), Kang Wen-Xiu (康文秀), Huai Jun-Xia (淮俊霞), Yang Guo-Chen (杨国琛) Influences of the surface elastic energy term K13 on the critical fields of liquid crystal cells and experimental measurement of K13 2005 Chinese Physics 14 386
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