標題: | ELECTRIC-FIELD-INDUCED DIRECTOR-FIELD TRANSITION 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;DIRECTOR FIELD;TRANSITION;CLOSED CONICAL CAVITY;UMBILIC;POINCARE;HYPERBOLIC SINGULAR POINT;DISCLINATION;CONTINUUM THEORY |
公開日期: | 1-十一月-1994 |
摘要: | Continuum theory and numerical method are utilized in this study to report the dependence of director-field transition induced by electric field on the elastic constants of nematic liquid crystal (NLC) with negative dielectric anisotropy in a closed conical cavity with perpendicular boundary conditions of NLC. Normal umbilic structure (NU), twisted umbilic structure (TU), normal hyperbolic point structure with a disclination ring (NH), twisted hyperbolic point structure with a disclination ring (TH), and normal Poincare structure (NP) are found to be stable structures in electric-field-induced transitions. Moreover, five typical sequences of transition, T-NU-->TU-->TH, T-NU-->TU-->NH-->TH, T-NU-->TU-->NH, T-NU-->NH, and T-NU-->NP-->NH are found in the range of applied voltage less than 10 V. The transition sequences and the transition voltages are strongly dependent on the ratios of elastic constants K-11/K-33 and K-22/K-33. |
URI: | http://hdl.handle.net/11536/2271 |
ISSN: | 0021-4922 |
期刊: | JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS |
Volume: | 33 |
Issue: | 11 |
起始頁: | 6249 |
結束頁: | 6254 |
顯示於類別: | 期刊論文 |