SOI光波導因為有高折射率差的特性，因此對於光場具有較強的侷限效果，並被廣泛應用於積體化光學元件。然而高折射率差也會導致極化相關的問題，因而限制其光學元件的表現。若要解決此一問題，可以使用的方法為極化分集系統以及極化偏振器，而本論文使用極化偏振器來解決極化相關的問題。
在本研究中，我們使用混合式電漿波導加入布拉格光柵來設計極化偏振器，因為電漿波導中不同極化光有不同傳播路徑以及不同的布拉格光柵共振波長，因此可以達到較好的效果。我們首先提出混合式電漿波導所設計的水平極化偏振器，在經過結構優化後，頻寬可以達到0.38μm，並且在波長1.55μm下的消光比及插入損耗分別為26dB及0.22dB，而元件長度可縮小到約3μm。另外我們也提出倒置電漿波導所設計的水平極化偏振器，透過結構優化後，頻寬可以達到35nm，並且在波長1.55μm下的消光比及插入損耗分別為24.5dB及0.6dB，而元件長度約14μm。
除此之外，我們也提出混合式電漿波導所設計的垂直極化偏振器，在調整結構參數後，頻寬達到0.15μm，並且在波長1.55μm下的消光比及插入損耗分別為34.7dB及0.58dB，而元件長度為4.84μm。本論文成功利用混合式電漿波導設計極化偏振器，相較於其它水平極化偏振器，我們所優化的水平極化偏振器具有頻寬較大且損耗較小的特性，而垂直極化偏振器的消光比與其他垂直極化偏振器相比也較大。

Silicon on Insulator (SOI) waveguides can confine light in a small region due to their high index contrast and have been widely used in integrated optics. However, high index contrast also leads to strong polarization dependence, which will limit the device performance. To overcome this drawback, polarization diversity systems and polarization polarizers have been proposed. In this thesis, we investigate polarization polarizers to solve the problem.
We utilize hybrid plasmonic waveguides and Bragg gratings to design polarization polarizers. Owing to polarized light has different paths and Bragg wavelengths, better performance can be achieved. We optimize a TE polarizer based on hybrid plasmonic waveguides. The optimized design shows that the bandwidth and device length are 0.38μm and 3μm, respectively. The extinction ratio and insertion loss can be improved to be 26dB and 0.22dB, respectively, at 1.55μm wavelength. Besides, we have proposed TE polarizer based on inverted hybrid plasmonic waveguide. The optimized design possesses the bandwidth of 35nm with the device length is 14μm. The extinction ratio and insertion loss are 24.5dB and 0.6dB, respectively, at 1.55μm wavelength.
We have also proposed a TM polarizer based on hybrid plasmonic waveguides. The simulation results indicate that the optimized bandwidth and device length is 0.15μm and 4.84μm, respectively. At 1.55μm wavelength, the extinction ratio and insertion loss are 34.7dB and 0.58dB, respectively. Our optimized TE polarizer has larger bandwidth and lower insertion loss than other TE polarizers. The proposed TM polarizer shows larger extinction ratio than other TM polarizers.

致謝....................................................................................................................................i
中文摘要...........................................................................................................................ii
英文摘要..........................................................................................................................iii
目錄..................................................................................................................................iv
圖目錄..............................................................................................................................vi
表目錄...............................................................................................................................x
第 一 章 緒論...............................................................................................................1
1.1 SOI光波導.........................................................................................................1
1.2極化分集系統....................................................................................................2
1.3極化偏振器........................................................................................................5
1.4研究動機............................................................................................................9
第 二 章 混合式表面電漿波導元件...........................................................................10
2.1表面電漿波共振模態.......................................................................................10
2.2表面電漿波激發方法.......................................................................................18
2.3混合式表面電漿波導元件...............................................................................21
第 三 章 水平極化布拉格光柵極化偏振器數值分析...............................................27
3.1布拉格光柵極化偏振器...................................................................................27
3.2水平極化布拉格光柵極化偏振器特性分析...................................................29
3.3製程容忍度.......................................................................................................35
第 四 章 倒置電漿波導所構成的水平極化通過布拉格光柵極化偏振器數值分
析.......................................................................................................................38
4.1 倒置電漿波導所構成極化偏振器.................................................................38
4.2 製程容忍度......................................................................................................45
第 五 章 垂直極化布拉格光柵極化偏振器數值分析...............................................47
5.1垂直極化布拉格光柵極化偏振器...................................................................47
5.2垂直極化布拉格光柵極化偏振器數值分析...................................................49
5.3製程容忍度.......................................................................................................54
第 六 章 結論...............................................................................................................56
參考文獻.........................................................................................................................58

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