Alipanah Zhila, Zakerhamidi Mohammad Sadegh, Ranjkesh Amid
Faculty of Physics, University of Tabriz, Tabriz, Iran.
Photonics Center of Excellence, University of Tabriz, Tabriz, Iran.
Sci Rep. 2022 Jul 25;12(1):12676. doi: 10.1038/s41598-022-16750-x.
The presence of optical anisotropy in liquid crystals (LCs) has caused these materials to have dual refractive indices: ordinary (n) and extra-ordinary (n). Many fundamental information about LCs can be found by looking at these refractive indices. In this work, the refractive indices of four mixtures nematic liquid crystal (NLC) have been studied as a function of temperature, and the relevant functions were then calculated. Subsequently, the order parameter of mentioned LCs was determined using three methods: Vuks, Haller, and the effective geometry parameter method. It was concluded that the obtained values are not significantly different and exhibit the same temperature dependence. The obtained results were evaluated in relation to the approach utilized.
液晶（LCs）中光学各向异性的存在使得这些材料具有双折射率：寻常折射率（n）和非寻常折射率（n）。通过研究这些折射率可以获得许多关于液晶的基本信息。在这项工作中，研究了四种向列相液晶（NLC）混合物的折射率随温度的变化，并计算了相关函数。随后，使用三种方法确定了上述液晶的序参量：武克斯法、哈勒法和有效几何参数法。得出的结论是，所获得的值没有显著差异，并且呈现出相同的温度依赖性。根据所采用的方法对获得的结果进行了评估。
