臺灣博碩士論文加值系統

在本論文中，我們提出應用非線性材料來達到全光調制和光開闢的導模共振(guided mode resonance, GMR)結構，我們應用兩種不同特性的偶氮染料(azo-dye)，來作光調制GMR，其中一種材料為主－客系統DR1/PMMA，另一種為液晶偶氮材料(LC azopolymer)。而GMR結構設計為二維週期結構/波導層/非線性材料/基板。在製程上，我們應用雙光束干涉系統來製作GMR的週期性結構，其製程簡單、快速、低成本，並且可獲得大面積的全光調制GMR結構。在實驗上，我們證明使用非線性材料可以成功地達成全光調制的GMR。

總目錄
摘要------------------------------------------------------I
總目錄---------------------------------------------------II
圖目錄---------------------------------------------------IV
表目錄-------------------------------------------------VIII
第一章緒論------------------------------------------------1
1-1 導模共振 (guided mode resonance, GMR)簡介-------------1
1-2 導模共振的應用----------------------------------------6
1-3 實驗動機----------------------------------------------9
第二章理論-----------------------------------------------10
2-1 波導共模原理-----------------------------------------10
第三章 樣品設計與製備------------------------------------14
3-1 全光控制之導模共振結構設計---------------------------14
3-2 樣品製備實驗流程-------------------------------------15
1-2 DR1/PMMA與LC azopolymer------------------------------21
第四章 實驗架設------------------------------------------25
4-1利用稜鏡耦合技術量測薄膜折射率與厚度------------------25
4-2 雙光束干涉實驗架設-----------------------------------29
4-3 GMR反射光譜量測系統----------------------------------30
4-4 GMR pump-probe實驗系統-------------------------------31
4-5 反射光譜之實驗架設加上OPO Laser Pump 365nm-----------32
第五章 實驗結果與討論------------------------------------34
5-1 GMR反射光譜量測--------------------------------------34
5-2 GMR結構和DR1/PMMA 主動層之反射光譜-------------------36
5-3 全光調控之GMR量測------------------------------------37
5-3-1 一般GMR結構與DR1/PMMA GMR 之比較-------------------37
5-3-2 全光調控GMR/(DR1/PMMA)-----------------------------38
5-4量測AZO LC之反射光譜----------------------------------45
5-5 使用OPO Laser Pump 365nm/460nm量測LC AZO-------------46
第六章 結論與未來工作------------------------------------47
參考文獻-------------------------------------------------51

圖目錄
圖1-1-1 (a)導模共振(Guided mode resonance,GMR)結構設計與原理示意圖模擬計算GMR反射光譜圖，黑色線和紅色線為吸附不同分子的GMR反射光譜---------------------------------------------3
圖1-1-2 樣品結構與參數------------------------------------4
圖1-1-3 a.TE反射/穿透光譜 b.TM反射/穿透光譜---------------5
圖1-1-4 a.波導層深度為300nm b.波導層深度為300nm-----------5
圖1-2-1 架設圖與結構圖------------------------------------7
圖1-2-2 0nm至100nm物質(n=1.3)在GMR表面所產生的TE頻譜圖----7
圖1-2-3 a.窄線偏極雷射b.可調偏極雷射----------------------8
圖2-1-1 入射光、共振與繞射示意圖-------------------------11
圖 3-1-1樣品示意圖，a. guiding film為DR1-PMMA，b. guiding film為LC azopolymer--------------------------------------14
圖3-2-1 實驗流程示意圖-----------------------------------15
圖3-2-2 玻璃基板清洗流程圖-------------------------------16
圖3-2-3 DR1-PMMA薄膜厚度(利用αstep measurement量測)與蒸發時間比-----------------------------------------------------17
圖3-3-1 DR1/PMMA分子，a. trans-異構體（長鏈棍狀）b. cis-異構體（彎折狀---------------------------------------------22
圖3-3-2 吸收光譜圖---------------------------------------22
圖3-3-3 能階圖-------------------------------------------22
圖3-3-4 LC azopolymer分子--------------------------------23
圖3-3-5 a.分子型式是平行Z方向的橄欖球狀分子，且Y = X方向對稱，其吸收光譜在365nm有良好的吸收b.分子型式是球狀的中心對稱型式，其吸收光譜在約460nm產生新的吸收峰，c. 分子從原本是球狀分子其平行激發光方向會被壓縮，其吸收光譜在460nm的吸收峰消失-------------------------------------------------------24
圖4-1-1 稜鏡耦合透視圖-----------------------------------26
圖4-1-2 稜鏡耦合器的結構圖-------------------------------27
圖4-1-3 反射光強度對入射角作圖---------------------------27
圖4-1-4 對波長為632.8nm之稜鏡耦合器的實驗儀器架設圖------28
圖4-2-1 雙光束干涉光路架設示意圖-------------------------29
圖4-2-2 SEM圖--------------------------------------------30
圖4-3-1 量射反射光譜光路示意圖---------------------------31
圖4-4-1 Pump 442nm與量射反射光譜光路示意圖---------------32
圖4-5-1 LC AZO照射365nm之光路示意圖----------------------33
圖4-5-2 LC AZO照射460nm之光路示意圖----------------------34
圖5-1-1 波導層(guided layer)加上二維光子晶體層(2D grating layer)之樣品---------------------------------------------35
圖5-1-2 guided layer加上2D grating layer之樣品量測，其中樣品正放的為a.入射光為P偏振與b. 入射光為S偏振--------------35
圖5-2-1 guided layer與2D grating layer在DR1-PMMA上(厚度約2μm)之樣品-----------------------------------------------37
圖5-2-2量測guided layer與2D grating layer在DR1-PMMA上(厚度約2μm)之樣品中a.入射光為S偏振與b. P偏振------------------37
圖5-3-1 a.波導層(guided layer)加上二維光柵層(2D grating layer)之樣品b.波導層(guided layer)與二維光柵層(2D grating layer)加在上DR1-PMMA披覆層(主動層)之樣品-----------------39
圖5-3-2 樣品角度為25o，入射光為S偏振，其He-Cd Laser 功率為70mW a.激發光偏振為S偏振b. 激發光偏振為P偏振-------------40
圖5-3-3 樣品角度為25o，入射光為S偏振，其He-Cd Laser 功率為70mW a.激發光偏振為S偏振的波導模態共振的位移量b.激發光偏振為P偏振的波導模態共振的位移量----------------------------42
圖5-3-4 激發光光強與GMR最大位移量之關係------------------44
圖5-3-5 全光調制光開關之GMR實驗圖------------------------45
圖5-4-1 guided layer與2D grating layer在LC AZO上之樣品---46
圖5-4-2量測guided layer與2D grating layer在LC AZO上之樣品中a.入射光為S偏振與b. P偏振--------------------------------46
圖5-5-1 LC AZO照射OPO Laser之反射光譜圖，黑線為未照射過，紅線為照射過365nm，藍線為照射過460nm，其中激發的偏振為S偏振-----------------------------------------------------------47
圖5-5-2 LC AZO照射OPO Laser激發10分鐘，P偏振為之反射光譜圖，a.激發光波長365nm，b. 激發光波長365nm----------------48

表目錄
表 4-1-1 波長為632.8nm量測不同材料之折射率---------------28
表5-3-1 Fitting 參數表，T1為AHB效應所需時間，T2為AR效應所需時間，A1為AHB效應所反應的距離，T2為AR效應所反應的距離，Y0為反應到最遠的距離-----------------------------------------43

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