烏采結構的氧化鋅晶體由於其自發極化向量的影響，在沿著c軸方向的鋅面與氧面會有不同的極化電場。本文使用厚度0.5mm的氧化鋅單晶體，藉由光調製反射光譜與非接觸式電場調製反射光譜的實驗技術，來判定其兩個面的內建電場方向。發現在鋅面兩個實驗的光譜反相，因此其表面電場方向為由內向外；氧面兩個實驗具有同相的光譜，因此其表面電場方向為由外向內。

There are different polarization fields on the Zn face and O face along the c-axis of the ZnO single crystal due to the influence of the spontaneous polarization. In this work we will determine the internal field directions of both faces of the 0.5mm thick ZnO single crystal by photoreflectance and contactless electroreflectance techniques. We found that Zn face has inversion phase line shape, which means its internal field directs outward; O face has same phase line shape, which means its internal field directs inward.

致謝 1
摘要 2
ABSTRACT 3
第一章 導論及相關理論 4
一、 實驗源起 4
二、能帶 5
三、激子 exciton 8
四、調制光譜學介紹 9
第二章 調製光譜學的光學性質 11
一、調製光譜學的機制 11
二、電子躍遷理論 12
三、介電函數與反射率 14
四、低電場調製 20
第三章 實驗設計 23
3.1 實驗樣品 23
3.1.1 氧化鋅簡介 23
3.1.2 實驗樣品 24
3.1.3 極化 25
3.2 實驗裝置 26
3.2.1 PR 26
3.2.2 CER 28
3.3 調製訊號分析 31
3.4 實驗相位分析 34
3.4.1 PR的相位分析 34
3.4.2 CER的相位分析 35
3.5 樣品表面結構分析 37
3.6 表面蝕刻 38
第四章 實驗結果與討論 43
4.1 實驗圖形分析 43
第五章 結論 50
REFERENCES 51

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