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論文中文名稱:非均向光學薄膜之偏極轉換量測與應用 [以論文名稱查詢館藏系統]
論文英文名稱:Measurement and Application of Polarization Conversion from an Anisotropic Thin Film [以論文名稱查詢館藏系統]
院校名稱:臺北科技大學
學院名稱:機電學院
系所名稱:機電科技研究所
中文姓名:彭成瑜
英文姓名:Cheng-Yu Peng
研究生學號:92669020
學位類別:博士
語文別:中文
口試日期:2007-05-12
論文頁數:87
指導教授中文名:任貽均
口試委員中文名:李正中;周晟;林世聰;陳學禮
中文關鍵詞:非均向光學薄膜偏極轉換光學常數
英文關鍵詞:anisotropic thin filmpolarization conversionoptical constants
論文中文摘要:本論文利用稜鏡/非均向光學薄膜/空氣組態增強斜向入射的偏極轉換反射率,來探討單層柱狀結構薄膜隨角度和波長的光學特性與光學常數的量測。發現在特定的入射角範圍會反射偏極轉換的帶通光譜,並分析膜層厚度、入射角、入射平面角對光譜曲線的影響。實驗上以斜向沈積方法製鍍單層柱狀氟化鎂薄膜,當變化入射角時,會造成帶通光譜曲線的位移;而變化入射平面角(旋轉基板)會改變柱狀結構的方位,並造成光譜曲線的位移。另外,發現在單層非均向光學薄膜的架構下,只要再加鍍一層均向性薄膜(安排在稜鏡/非均向性薄膜/高折射率均向薄膜/空氣系統和稜鏡/非均向性薄膜/低折射率均向薄膜/空氣系統)便可產生窄帶偏極轉換光譜;而寬帶偏極轉換光譜可由系統(稜鏡/低折射率均向薄膜/非均向性薄膜/空氣)獲得。
另一方面,偏極轉換隨角度變化相當靈敏,可以用來測量非均向性薄膜的光學常數。因此本論文探討隨入射角度變化的偏極轉換反射率曲線,基於變化光學常數對角頻譜曲線的靈敏度分析,而光學常數的精確度可由入射角與強度量測的解析能力來決定。非均向性薄膜的光學常數包含三個主軸折射率、柱狀傾角、膜層厚度,在此提出三角形收斂方法將光學常數的精確度限制在量測誤差的範圍內,僅使用簡易而靈敏的強度量測方法即可精確測量非均向性薄膜之光學常數。
論文英文摘要:This work presents the polarization conversion reflectance (PCR) is enhanced by light reflected from a single-layered system (prism/anisotropic thin film/air) at a certain incident angle range. The columnar magnesium fluoride film was prepared by oblique angle deposition. The relations between wavelength and angular spectra of PCR and optical constants of the prism/anisotropic thin film/air configuration are built and discussed. The band-pass PCR wavelength spectrum can be modulated by changing thickness, orientation of deposition plane, and the angle of incidence. In addition, arranging an isotropic thin film yields the narrowband PCR spectrum with respect to the prism/anisotropic thin film/low-refractive thin film/air system and prism/anisotropic thin film/high-refractive thin film/air system. The broadband PCR spectrum is obtained by arranging prism/ low-refractive thin film/anisotropic thin film/ air system.
On the other hand, it is shown that the angular-dependent PCR is sensitive enough to determine optical constants. The sensitivities of the angular spectrum of PCR to variations of optical constants are calculated and analyzed. Based on the sensitivity calculation, the accuracy of detected optical constants can be derived by considering the resolution ability in angle and intensity measurement. The anisotropic optical constant determination, including three principal indices, a tilt angle, and a thickness, can be determined from the sensitive-angular spectrum of PCR. Here, the triangle convergence method proposes that the optical constants can be resolved to approach the restricted range from measurement inaccuracy.
論文目次:中文摘要……………………………………………………….……………………....i
英文摘要……………………………………………………….……………………..iii
誌謝……………………………………………………….…………………………...v
目 錄…………………………………………………………………………….....…vi
表 目 錄…………………………………………………………………………….viii
圖 目 錄…………………………………………………………………….………..ix
第一章 緒論與文獻回顧 1
1.1 文獻回顧 1
1.2 非均向性介質的偏極轉換現象 7
1.3 單一柱狀結構之光學薄膜 8
第二章 非均向光學薄膜之光學計算 17
2.1 非均向性薄膜之Haiming Wang量測理論 18
2.1.1 非均向性光學薄膜之波向量分佈 18
2.1.2 非均向性薄膜內之非對稱反射現象 21
2.1.3 入射平面與沈積平面重合之反射係數計算 22
2.2 非均向性薄膜之向量法計算 25
2.2.1 電磁波入射非均向性薄膜的反射係數與透射係數 25
2.2.2 單層非均向性薄膜的偏極轉換向量處理 29
2.3 非均向性薄膜之矩陣法計算 34
2.3.1 非均向性物質的傳播方程式 34
2.3.2 單層非均向性薄膜的反射係數與透射係數 36
第三章 偏極轉換隨波長與角度變化之特性 40
3.1 非均向薄膜之顯著偏極轉換特性 40
3.1.1 偏極轉換隨角度變化之特性 40
3.1.2 偏極轉換對應波長變化之特性 47
3.2 實驗架構與偏極轉換曲線量測 50
3.2.1 蒸鍍系統 50
3.2.2 蒸鍍流程 51
3.2.3 蒸鍍架構 51
3.2.4 量測儀器 52
3.3 偏極轉換光譜之波長調制 54
3.3.1 入射角、入射平面角對偏極轉換光譜之影響 54
3.3.2 實驗數據與結果 57
3.4 窄帶、寬帶偏極轉換光譜 60
3.4.1 薄膜厚度對偏極轉換光譜之影響 60
3.4.2 實驗數據與結果 65
第四章 非均向性光學薄膜之偏極轉換量測方法 68
4.1 非均向性薄膜之偏極轉換效應 68
4.2 偏極轉換曲線之靈敏度分析 72
4.3 實驗架構與偏極轉換量測 76
4.4 實驗結果與討論 77
4.4.1 以三角形收斂方法決定非均向薄膜之光學常數 77
4.4.2 非均向性光學薄膜之折射率色散量測 79
第五章 結論 81
參考文獻……………………………………………………….…………….……....82
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