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制备了一种掺杂有机给体和受体分子的向列相液晶 (nematicliquidcrystals)材料。掺杂的给体和受体分子使液晶材料的光折变性能大为提高。用此材料做成的夹心器件进行了能量二波耦合、简并四波混频等实验。在外加低直流电场 (0 5kV/cm)条件下 ,观察到了光折变增益Γ为 44 1cm-1,二波能量耦合实验中观察到的衍射光束达到 6级 ,简并四波混频中最大衍射效率达到 5 8% ,写入混合物材料的信号光栅线已可保存数小时而无明显衰减
A nematic liquid crystal material doped with organic donor and acceptor molecules was prepared. Doped donor and acceptor molecules greatly improve the photorefractive properties of liquid crystal materials. Sandwich devices made of this material were subjected to experiments such as energy two-wave coupling and degenerate four-wave mixing. Under the condition of applied low DC electric field (0 5 kV / cm), the photorefractive gain Γ was 44 1 cm-1, and the diffracted light beam observed in the two-wave energy coupling experiment reached level 6 and the maximum degenerated four-wave mixing Diffraction efficiency of 58%, written to the mixture of signal grating signal lines can be stored for several hours without significant attenuation