臺灣博碩士論文加值系統

本研究選用偶氮苯化合物 2-{[4-(二甲氨基)苯基]偶氮基}苯甲酸 (4-Dimethylaminoazobenzene-2’-carboxylic acid, Methyl Red，簡稱 MR) 與基材 3-氨基丙基三乙氧基矽烷 ((3-Aminopropyl)triethoxysilane, APTES，簡稱 AP)，使 MR 與 AP 形成離子鍵結，製備動態全像記錄的偶氮苯全像材料。以功率為 200 mW/cm² 的 532 nm DPSS 雷射干涉寫入，繞射效率量測中發現有兩個峰，第一個可在短時間內產生，並在寫入光關閉後消失。我們透過厚度的改變，驗證此為折射率變化的像位式光柵所造成。研究顯示，厚度增加使最大繞射效率增加，厚度5092 nm 樣品，在0.2秒內達到最大繞射效率2.7 %。然而，材料在寫入光波段有吸收，膜厚增加到一定程度後，繞射效率無法進一步提升。

為了提升光學性能與擴展實用性，將材料添加雙折射特性的液晶混合物E7。研究顯示，莫耳數比1: 6的樣品，在0.4秒內達到最大繞射效率5.2 %。也發現材料隨著溶劑的揮發，光學性能也受影響。研究顯示，E7與MR莫耳數比1: 6且揮發時間3小時，在0.3秒內達到最大繞射效率8.7 %，為本研究最佳參數，並在寫入光關閉後，繞射效率在2638秒後自然消失。由於改變不同參數，需進一步分析對響應時間、最大繞射效率與衰退時間的影響。

In this study, we selected the azoenzene compound 4-Dimethylaminoazobenzene-2’-carboxylic acid (Methyl Red, MR) and the substrate (3-Aminopropyl)triethoxysilane (APTES, AP). MR and AP form ionic bonds, creating azo holographic materials for dynamic holographic recording. A 532 nm DPSS laser with a power of 200 mW/cm² was used for interference recording. Diffraction efficiency measurements revealed two peaks; the first peak appeared in a short time and disappeared when the writing light was turned off. We verified through thickness changes that this was caused by a refractive index phase grating. The study showed that increasing the thickness led to a higher maximum diffraction efficiency. For a sample with a thickness of 5092 nm, the maximum diffraction efficiency of 2.7% was achieved within 0.2 seconds. However, due to the material''s absorption in the recording light wavelength, the diffraction efficiency could not be further increased after the film thickness reached a certain point.

To enhance optical performance and expand practical applications, a birefringent liquid crystal mixture, E7, was added to the material. The study showed that a sample with a molar ratio of 1:6 achieved a maximum diffraction efficiency of 5.2% within 0.4 seconds. It was also found that the optical performance of the material was affected as the solvent evaporated. The study showed that with an MR to E7 molar ratio of 1:6 and an evaporation time of 3 hours, a maximum diffraction efficiency of 8.7% was achieved within 0.3 seconds, representing the optimal parameters in this study, and the diffraction efficiency naturally decayed after 2638 seconds when the writing light was turned off. Further analysis is needed to understand the impact of different parameters on response time, maximum diffraction efficiency, and decay time.

論文審定書 i
誌謝 ii
摘要 iii
Abstract iv
目錄 v
圖目錄 viii
表目錄 x
第一章 緒論 1
1.1 前言 1
1.2 研究動機與目的 2
1.3 研究架構 3
第二章 原理與文獻回顧 4
2.1 全像術 4
2.2 全像術應用 5
2.3 全像儲存材料種類 7
2.3.1 鹵化銀材料 (Silver halide emulsion) 7
2.3.2 重鉻酸鹽明膠 (Dichromated Gelatin,DCG) 7
2.3.3 光折變材料 (Photorefractive Crystal) 8
2.3.4 感光類材料 (Photographic material) 8
2.4 各類動態紀錄全像材料文獻回顧 9
2.5 全像光柵分類 11
2.6 偶氮苯材料光柵形成機制 13
2.6.1 偶氮苯的幾何異構 (Geometric isomers of azobenzene) 13
2.6.2 光致變系統機制 13
2.6.3 光致定向分子的運動型態類型 14
2.6.4 偶氮苯之相位式光柵(Phase grating) 15
2.7 基材APTES 16
2.8 含液晶的偶氮苯類材料 17
2.9 繞射效率 18
第三章 研究方法 19
3.1 實驗藥品 19
3.2 實驗流程 20
3.2.1 MA 材料製程 20
3.2.2 E7/MA 材料製程 21
3.3樣品代號與組成參數控制 22
3.4 實驗儀器及分析方法 24
3.4.1超音波震盪機 (Ultrasonic cleaner) 24
3.4.2 旋轉塗佈機 (Spin coater) 24
3.4.3 傅立葉轉換紅外光譜儀 (Fourier transform infrared spectrometer) 24
3.4.4 三維輪廓儀 (Alpha-step profilometer) 25
3.4.5 精密電子天平 (Electronic balance) 25
3.4.6 紫外-可見光光譜儀 (UV-visible spectrometer) 25
3.5 全像干涉實驗 26
3.5.1實驗設備 26
3.5.2 全像記錄與讀取 26
第四章 結果與討論 29
4.1 材料的合成鑑定分析 29
4.1.1 傅立葉轉換紅外光光譜儀 (FTIR) 29
4.1.2 紫外-可見光光譜儀 35
4.1.3 材料的合成與鑑定分析小結 35
4.1.4 三維輪廓儀 (Alpha-step Profilometer) 38
4.2 光學特性 40
4.2.1 不同膜厚MA材料之一階最大繞射效率與自然衰退 40
4.2.2 不同膜厚MA材料對應穿透率量測 46
4.2.3 不同比例E7/MA材料之一階最大繞射效率與自然衰退 48
4.2.4 不同甲醇揮發程度 MA 材料之一階最大繞射效率與自然衰退 52
4.2.5 不同甲醇揮發程度 E7/MA 材料之一階最大繞射效率與自然衰退 57
4.2.6 光學特性綜合討論 61
第五章 結論 64
未來工作 65
參考文獻 66

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