Choudhary Amit, Li Guoqiang
Opt Express. 2014 Oct 6;22(20):24348-57. doi: 10.1364/OE.22.024348.
Study of the liquid crystal (LC) director around nanoparticles has been an important topic of research very recently, since it allows design and fabrication of next-generation LC devices that are impossible in the past. In our experiment, alkanethiol-capped gold nanoparticles (GNPs) were dispersed in nematic LC. Analysis of the LC director around GNPs was performed by investigating the behavior of surface plasmon polariton (SPP) absorption peaks of the GNPs using spectrophotometry technique. It is found that the incident linearly polarized light orientated at 0°, 45°, and 90° angles with respect to the rubbing direction experiences varying interaction with the LC medium. The corresponding transmission of light reveals the anisotropic shift in wavelength of SPP peak. The anisotropic behavior of SPPs of the GNPs is in agreement with theoretical calculations.
近年来，对纳米颗粒周围液晶（LC）指向矢的研究一直是一个重要的研究课题，因为它能够设计和制造过去无法实现的下一代液晶器件。在我们的实验中，烷硫醇包覆的金纳米颗粒（GNP）被分散在向列型液晶中。通过使用分光光度技术研究GNP的表面等离激元极化激元（SPP）吸收峰的行为，对GNP周围的液晶指向矢进行了分析。结果发现，相对于摩擦方向以0°、45°和90°角取向的入射线偏振光与液晶介质的相互作用各不相同。相应的光透射率揭示了SPP峰波长的各向异性位移。GNP的SPP的各向异性行为与理论计算结果一致。
