本論文採用雷射誘發全像光柵技術，藉由改變樣品溫度、濃度、激發光強度與偵測光偏振方向，來研究摻雜偶氮染料在液晶中的相位光柵形成機制。此研究中，發現光柵繞射現象是因為受激發偶氮染料分子由順式轉變為反式的同素異構化所致，另外液晶分子排列結構也對繞射有影響，對此本論文提出樣品一階繞射現象之解釋，並歸納出溫度、濃度、激發光強度與偵測光偏振方向對實驗結果的影響。

The laser-induced holographic gratings in the azo-dye-doped liquid crystals have been investigated by changing the temperature, and the concentration of the sample, the intensity of the two writing beams, and the polarization of probe beams. The cw Nd:YAG laser has been employed as the writing beams and the cw He-Ne laser has been employed as a real-time probe beam to detect the first order diffraction singals. The gratings are the results of photo-isomerization of azo dye and the structure alignment of liquid crystals. The model has been established to explain the first order diffraction signals, the mechanism of gratings formation and the temperature dependence.

章節索引：
中英文摘要 1
第一章 簡介
1-1 前言 2
1-2 液晶簡介 3
1-3 液晶物理 10
1-4 偶氮染料(Azo-Dye)簡介 18
第二章 相關理論
2-1 全像術與全像光柵 20
2-2 全像光柵的分類和特性 22
2-3 全像光柵機制 28
2-4摻雜偶氮染料液晶(Azo dye-doped in liquid crystals)中的光學非線性
效應和光柵探討 29
第三章 實驗方法與過程
3-1 樣品的製備 34
3-2 實驗樣品的製作 35
3-3 實驗裝置 38
3-4 實驗步驟與過程 41
第四章 實驗結果與討論
4-1偵測光偏振方向對於摻雜染料液晶薄膜一階繞射訊號的影響 42
4-2寫入光強度對摻雜染料液晶薄膜的一階繞射訊號之
影響 49
4-3改變樣品濃度對一階繞射訊號之影響 51
第五章 總結與未來展望
5-1 總結 53
5-2 未來展望 54
參考文獻 55

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