Influences of the surface elastic energy term K13 on the critical fields of liquid crystal cells and experimental measurement of K13

• 来源期刊: 中国物理（英文版）
• 关键词: threshold field saturation field surface elastic term K13 experimental measurement
• 年，卷（期）: 2005,（2）
• 页码范围: 386-392
• 页数: 7页
• 语种: 英文

摘要

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 K13with a wedge-shaped planar-aligned weak anchoring NLC cell. The numerical experiments are carried out to verify the feasibility of our method.