標題: | STABILITY OF AN UMBILICAL DIRECTOR FIELD OF NEMATIC LIQUID-CRYSTAL IN A CLOSED CONICAL CAVITY |
作者: | WEI, JG CHEN, SH 交大名義發表 光電工程學系 National Chiao Tung University Department of Photonics |
關鍵字: | NEMATIC LIQUID CRYSTAL;STABILITY;DIRECTOR FIELD;CLOSED CAVITY;UMBILIC;POINCARE;DISCLINATION;CONTINUUM THEORY |
公開日期: | 1-五月-1994 |
摘要: | This letter studies the stability of a single umbilical director field of nematic liquid crystal (NLC) in a closed cavity with external electric field. To form the single umbilic structure, we filled NLC with negative dielectric anisotropy in a closed conical cavity and made molecules align perpendicular to the cavity wall. Electric field was applied along the symmetry axis of the cavity. Using the continuum theory, we show that an umbilical director field will transform to a director field of a hyperbolic singular point with disclination ring instead of a Poincare structure at a critical voltage. |
URI: | http://dx.doi.org/10.1143/JJAP.33.L660 http://hdl.handle.net/11536/2520 |
ISSN: | 0021-4922 |
DOI: | 10.1143/JJAP.33.L660 |
期刊: | JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS |
Volume: | 33 |
Issue: | 5A |
起始頁: | L660 |
結束頁: | L662 |
顯示於類別: | 期刊論文 |