臺灣博碩士論文加值系統

雙丙烯酸酯是一種高分子液晶，其兩邊具有光敏性官能基。兩款典型的雙丙烯酸酯：RM257及RM82具有非線性特性。在波長632.8nm的氦氖雷射照射下，兩款材料皆會有雙光子吸收之反應。
過去實驗室利用波長632.8nm的氦氖雷射在不同溫度條件下記錄雙光束干涉光場、三光束干涉光場、於雙丙烯酸酯寫入二維圖形。本論文探討雙丙烯酸酯材料之非線性光學特性，我們使用波長632.8nm的氦氖雷射引發雙丙烯酸酯聚合，判斷雙光子吸收過程使雙丙烯酸酯產生自由基。同時整合了在雙丙烯酸酯上做的研究，歸納出過去的研究成果可另外延伸之可行研究方向。

The diacrylatemesogen is a well-known liquid crystal polymer which comprises photo-polymerizable acrylic end groups.For example, two typical diacrylate compounds RM257 and RM82 exhibit nonlinear optical responses.They showed strong two-photon absorption(TPA) at wavelength λ = 632.8 nm[1].
In previousstudy,we not only use diacrylatemesogen to record the two-beam interference field and three-beam interference field at differenttemperaturebut also writing two-dimensional patternsintodiacrylatemesogensby using 632.8 nm He-Ne Laser.
In this study, the nonlinear optical properties of the diacrylatemesogens were investigated.The polymerization of the diacrylatemasogens can be initiated using 632.8nm wavelength emitted from a He-Ne laser.It is thought that the radicals required for the polymerization are produced during a TPA process.We also sort out all the study of diacrylatemesogens of laboratory,and summarizing the feasible research directions that can be extended by the past research results

致謝 …………………………………………………………………………………i
摘要 …………………………………………………………………………………ii
Abstract………………………………………………………………………………iii
目錄 …………………………………………………………………………………iv
圖目錄 ………………………………………………………………………………vi
第一章 緒論…………………………………………………………………………1
1.1 前言 ………………………………………………………………………1
1.2 研究動機及研究內容 ……………………………………………………1
第二章 液晶簡介……………………………………………………………………2
2.1 液晶相態 …………………………………………………………………2
2.2 液晶分類 …………………………………………………………………3
2.3 液晶連續彈性體理論 ……………………………………………………5
2.4 光學異向性 ………………………………………………………………7
2.5 介電異向性………………………………………………………………10
2.6 高分子液晶 ……………………………………………………………11
第三章 研究理論介紹……………………………………………………………13
3.1 自由基聚合………………………………………………………………13
3.2 全像技術簡介……………………………………………………………15
3.3 相位延遲法………………………………………………………………23
3.4 光柵繞射效率……………………………………………………………24

第四章 實驗材料、樣品製備及儀器設備…………………………………………26
4.1 實驗材料…………………………………………………………………26
4.2 樣品製備…………………………………………………………………28
4.3 儀器設備與實驗架設……………………………………………………29
第五章 雙丙烯酸酯應用於全像光學元件 ………………………………………31
5.1 影像記錄…………………………………………………………………31
5.2 影像重建及繞射效率……………………………………………………36
第六章 總結與未來展望 …………………………………………………………39
6.1 總結………………………………………………………………………39
6.2 未來展望…………………………………………………………………40
參考資料 ……………………………………………………………………………41

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