在聚合物掺杂液晶中使用正交线偏振光记录了特殊的一维光栅,这种光栅可以由探测光的偏振态控制衍射级的变化,当探测光为水平方向振动的线偏振光时,衍射级中只观察到零级和正一级衍射,无负一级衍射;当探测光为垂直方向振动的线偏振光时,衍射级中只观察到零级和负一级衍射,无正一级衍射,并且衍射级的偏振态与探测光的偏振态相互正交.最后运用琼斯矩阵从理论上解释了该实验现象.
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