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Hydrodynamic effects in the optically induced reorientation of nematic liquid crystals

✍ Scribed by R.F. Rodríguez; P. Ortega; R. Díaz-Uribe

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
661 KB
Volume
230
Category
Article
ISSN
0378-4371

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✦ Synopsis

We present a model to describe the first stages of the reorientation process of a nematic liquid crystal under the action of an obliquely incident optical field. The presence of hydrodynamic backflows associated with the reorientation in both, a homeotropic and a planar geometry, is explicitly taken into account. The phase change and the inverse focal length are calculated analytically and evaluated for the nematic phase of CBOOA. It is shown that for a homeotropic arrangement, hydrodynamic backflows may produce a significant and, in principle, measurable change as high as 75% in these properties.

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## Abstract The strain‐induced director reorientation process in nematic liquid single crystal elastomers is investigated for the case of an arbitrary angle between the original director and the external stress axis. If the mechanical stress is applied perpendicular to the original director axis, t