منابع مشابه
On the deflection of light by topological defects in nematic liquid crystals.
The influence of controllable parameters like temperature and wavelength on the trajectories of light in a nematic liquid crystal with topological defects is studied through a geometric model. The model incorporates phenomenological details as how the refractive indices depend on such parameters. The deflection of light by the topological defect is then shown to be greater at lower temperatures...
متن کاملHydrodynamics of topological defects in nematic liquid crystals.
We show that backflow, the coupling between the order parameter and the velocity fields, has a significant effect on the motion of defects in nematic liquid crystals. In particular, the defect speed can depend strongly on the topological strength in two dimensions and on the sense of rotation of the director about the core in three dimensions.
متن کاملSimulation and visualization of topological defects in nematic liquid crystals.
We present a method of visualizing topological defects arising in numerical simulations of liquid crystals. The method is based on scientific visualization techniques developed to visualize second-rank tensor fields, yielding information not only on the local structure of the field but also on the continuity of these structures. We show how these techniques can be used to first locate topologic...
متن کاملTopological Defects in Nematic and Smectic Liquid Crystals
TOPOLOGICAL DEFECTS IN NEMATIC AND SMECTIC LIQUID CRYSTALS Bryan Gin-ge Chen Randall D. Kamien Liquid crystals are materials with interesting symmetries and order, and their science and applications are a playground of geometry and elasticity. I discuss various aspects of the study of topology and topological defects in liquid crystalline systems beyond the traditional calculation of homotopy g...
متن کاملNematic Liquid Crystals: Defects
There are two types of defects in the uniaxial nematic F phase: line defects (disclinations) and point defects (hedgehogs and boojums). These are reviewed at three levels: (i) experimental observations; (ii) topological classification; and (iii) curvature elasticity. The reader is referred to the textbooks on liquid crystals (Chandrasekhar 1992, de Gennes and Prost 1993), defects (Kltman 1983),...
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ژورنال
عنوان ژورنال: Liquid Crystals
سال: 2011
ISSN: 0267-8292,1366-5855
DOI: 10.1080/02678292.2010.542494