我們利用扭轉向列型液晶(twisted nematic liquid crystals; TN LCs)測量c平面及m平面氧化鋅樣品之反射異向性光譜(reflectance anisotropy spectroscopy; RAS)，此實驗設置是參考Aspnes在1988年所提出之架構(D. E. Aspnes, J. P. Harbison, A. A. Studna and L. T. Florez, Appl. Phys. Lett. 52, 957, 1988)，我們可利用此量測方法來判斷氧化鋅樣品為c平面或m平面。最後我們還可以根據其光譜訊號之強度大小再配合上A、B、C三種激子的躍遷能量位置以及強度差異之正負號和大小來判斷m平面樣品c軸的方向。

Twisted nematic liquid crystals were used to measure reflectance anisotropy spectroscopy of m-plane and c-plane ZnO bulks. This experimental setup was based on Aspnes’s experimental setup in 1988 (D. E. Aspnes, J. P. Harbison, A. A. Studna and L. T. Florez, Appl. Phys. Lett. 52, 957, 1988). Whether the ZnO samples were c-plane or m-plane oriented can be determined by using this measurement. Finally, the direction of c-axis of the m-plane sample can also be determined.

目錄
論文審定書 i
致謝 ii
摘要 iii
Abstract iv
圖表目錄 vi
第1章 前言 1
第2章 反射異向性光譜 2
2-1 反射異向性光譜簡介 2
2-2 反射異向性光譜之原理 3
2-3 反射異向性光譜之系統架設 8
第3章 樣品與實驗裝置 10
3-1 氧化鋅簡介 10
3-2 使用扭轉向列型液晶測量反射異向性光譜之實驗架構 13
第4章 實驗結果 17
第5章 結論 21
參考文獻 22

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