研究了垂直排列C60掺杂的向列相液晶(5CB)记录光折变光栅衍射像的特性.利用二波耦合实验,以较小入射角的信号光束与参考光束在样品中干涉并形成光折变光栅.在远离样品的观察屏上可观察到高阶衍射像.对衍射像进行分析发现,信号光一侧的二阶衍射像被放大,而在参考光一侧的负一阶衍射虽没放大,但产生了180°旋转,理论分析与实验观察结果非常吻合.
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