Light-induced chaotic rotations in nematic liquid crystals.
Light-induced chaotic rotations in nematic liquid crystals.
复制标题
向列液晶中光引起的混沌旋转。
DOI：
10.1103/physreve.73.021704
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
L. Dubé
中科院分区：
文献类型：
--
作者：
E. Brasselet;L. Dubé
在旋转不变性的边界条件下（光和材料），在光学激发的向列型液晶膜中观察到各种非线性旋转机制。激发光为圆偏振光，强度分布为圆对称，样品位置处的光束直径比电池厚度小几倍。以光强为控制参数，确定了准周期性向混沌过渡。横向非局部效应被认为是观测到的动力学的原因，并建立了一个由耦合旋转体集合组成的简单模型来提供定性解释。
Various nonlinear rotation regimes are observed in an optically excited nematic liquid-crystal film under boundary conditions (for the light and material) that are invariant by rotation. The excitation light is circularly polarized, the intensity profile is circularly symmetric, and the beam diameter at the sample location is a few times smaller than the cell thickness. A transition to chaos via quasiperiodicity is identified when the light intensity is taken as the control parameter. Transverse nonlocal effects are suggested to be the cause of the observed dynamics, and a simple model consisting of a collection of coupled rotators is developed to provide a qualitative explanation.