Electric field induced biaxiality and the electro-optic effect in a bent-core nematic liquid crystal

被引：52
作者：
Nagaraj, Mamatha [1 ]
Panarin, Y. P. [1 ,2 ]
Manna, U. [1 ]
Vij, J. K. [1 ]
Keith, C. [3 ]
Tschierske, C. [3 ]
机构：
[1] Trinity Coll Dublin, Dept Elect & Elect Engn, Dublin 2, Ireland
[2] Dublin Inst Technol, Sch Elect & Commun Engn, Dublin 8, Ireland
[3] Univ Halle Wittenberg, Inst Organ Chem, D-06120 Halle, Germany
来源：
APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 01期
关键词：
electro-optical effects; nematic liquid crystals; MESOGENS; PHASE;
D O I：
10.1063/1.3280817
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report the observation of a biaxial nematic phase in a bent-core molecular system using polarizing microscopy, electro-optics, and dielectric spectroscopy, where we find that the biaxiality exists on a microscopic scale. An application of electric field induces a macroscopic biaxiality and in consequence gives rise to electro-optic switching. This electro-optic effect shows significant potential in applications for displays due to its fast high-contrast response. The observed electro-optic switching is explained in terms of the interaction of the ferroelectric clusters with the electric field.
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页数：3
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