摻雜染料的膽固醇光柵可以藉由激發光的光場偏振方向改變產生旋轉的變化。實驗結果指出，膽固醇光柵可以在有限的角度內做旋轉，其取決上下基板的配向方向。
此外，研究膽固醇光柵在混合配向的情況下，當d/p比值小於0.5時，可以在沒有外加電壓的情況下觀察到光柵。另外在混合配向下的膽固醇光柵可藉激發光的光場偏振方向改變，旋轉光柵360度。

A optically controlled cholesteric grating is proposed. The dye-doped cholesteric grating (DDCLC grating) can be rotated by changing the polarization of the pump-beam. The experiment results reveal that the orientation of the cholesteric grating can be rotated in a specific range decided by the alignment direction of the two substrates.
Moreover, the hybrid alignment condition for the cholesteric grating is also investigated. When the ratio of d/p is larger than 0.5,the cholesteric grating is observable without applying voltage in hybrid aligned cholesteric cell, and the cholesteric gratings with hybrid alignment can have a 360 rotation angle, thus achieve the two dimension beam steering cholesteric.

中文摘要..............................................................................I
Abstract…………………………………………………...II
第一章 導論........................................................................1
§1-1 前言............................................................................1
§1-2 液晶簡介....................................................................2
§1-2.1 何謂液晶.................................................................2
§1-2.2 液晶分類.................................................................2
§1-3 液晶物性....................................................................7
§1-3.1 秩序參數.................................................................7
§1-3.2 介電異向性.............................................................7
§1-3.3 折射率異向性.........................................................9
§1-3.4 賓主效應(Guest-host effect)..............................11
§1-3.5 連續彈性體理論....................................................11
§1-4膽固醇液晶的基本性質............................................12
第二章 相關理論...............................................................18
§2-1 光柵的分類...............................................................18
§2-1.1 記錄材料的吸光程度............................................18
§2-1.2 記錄材料的厚度大小............................................18
§2-1.3 記錄光線的干涉方向............................................21
§2-1.4 干涉光線的波形....................................................21
§2-2 光引致分子轉向效應...............................................22
§2-2.1 正力矩模型............................................................22
§2-2.2 負力矩模型............................................................24
§2-2.3吸附引致液晶排列效應.........................................25
第三章 樣品製作及實驗裝置............................................26
§3-1材料簡介.....................................................................26
§3-1.1 E7............................................................................26
§3-1.2 Methyl Red(MR)....................................................27
§3-1.3 NOA81....................................................................28
§3-2 藥品配製....................................................................28
§3-3 清洗玻璃....................................................................29
§3-4 玻璃表面處理............................................................29
§3-4.1 Polyimide...............................................................29
§3-4.2 NOA81....................................................................30
§3-4.3 DMOAP...................................................................30
§3-5 cell製作......................................................................31
§3-5.1雙面光配向引致膽固醇液晶光柵實驗樣品製作..31
§3-5.2單面光配向引致膽固醇液晶光柵實驗樣品製作..32
§3-5.3混合配向引致膽固醇液晶光柵實驗樣品製作......33
§3-6 儀器架設....................................................................34
第四章 實驗結果與討論....................................................35
§4-1雙面光配向引致膽固醇液晶光柵實驗.....................35
§4-2單面光配向引致膽固醇液晶光柵實驗.....................36
§4-2.1 單面光配向實驗.....................................................37
§4-2.2 改變激發光偏振方向與光柵之關係.....................38
§4-2.3 動態觀察改變激發光偏振方向與光柵之關係.....40
§4-3混合配向下膽固醇液晶光柵實驗.............................45
§4-3.1 混合配向下的膽固醇光柵.....................................45
§4-3.2 動態觀察光配向時的膽固醇光柵.........................47
§4-3.3 改變激發光偏振方向與光柵之關係.....................49
§4-3.4利用電壓調控混合配向時的膽固醇光柵..............51
第五章 結論.........................................................................53

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