液晶磁致旋光的研究

Research of magneto-optical rotation of liquid crystal

利用矩阵方法分析了液晶的旋光效应,导出了液晶旋光的矩阵表示.利用JG-3型连续可调谐磁场仪搭建实验装置,红外1350nm激光器做光源,测量了偏振光通过磁场作用下BL-009型向列相液晶的旋光角,详细分析了磁场对液晶旋光性能的影响.通过实验测试,对液晶的阈值磁场强度进行了讨论,同时对实验结果进行了理论上的分析,得出了液晶旋光角随磁场与液晶盒表面夹角而变化的结论,验证了液晶分子轴的旋转方向与磁场的方向无关,这为更好的研究液晶的特性以及液晶器件的设计具有重要的参考价值.

The matrix method is employed to analyze the optical activity of liquid crystal, and the matrix presentation of optical rotation is given. The magneto-optical rotation angle of BL-009 nematic liquid crystal is measured using JG-3 type continuous tunable magnetism device and infrared 1350 mn laser. The effect of magnetic field on optical rotation capability of liquid crystal is analyzed in detailed. The threshold of liquid crystal is discussed through experimental testing, and we reached at the conclusion that the rotation direction in liquid crystal is independent of the direction of magnetic field. The obtained result is useful for the design and manufacturing of liquid crystal device.