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研究生: 張瑋軒
論文名稱: 氮銻砷化鎵薄膜的光調制光譜研究
指導教授: 陸健榮
學位類別: 碩士
Master
系所名稱: 物理學系
Department of Physics
論文出版年: 2010
畢業學年度: 98
語文別: 中文
論文頁數: 94
中文關鍵詞: 氮銻砷化鎵光調制
英文關鍵詞: GaAsSbN, PR
論文種類: 學術論文
相關次數: 點閱:102下載:1
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  • 我們是以光調制吸收光譜(PR),對半導體材料氮銻砷化鎵做探討。在光調制光譜的變溫實驗裡,我們引用了Double BAC Model
    確定了氮銻砷化鎵的能隙。此外也發現了在能隙以下,存在一個可能是侷限態的躍遷訊號,藉由參考了一些處在侷限態的載子隨溫度變化的相關理論分析與模型,得知在高溫時侷限能態會逐漸被載子所佔滿 ,可以解釋侷限能態的躍遷能量隨溫度變化的情形。
    在使用不同波長雷射為調制源的光調制光譜,經過比較兩不同波長雷射得到的實驗結果,可以得知我們所量測到的調制訊號,分別來自材料氮銻砷化鎵本身,以及來自於砷化鎵基板與材料氮銻砷化鎵的界面附近。此外我們也藉著比較摻雜不同銻與氮濃度的樣品的實驗結果,來了解摻雜濃度對材料的影響。

    致 謝 I 摘 要 II 目 錄 III 第一章 簡 介 1 第二章 原理介紹 4 2.1電子躍遷理論 4 2.2 物質光學常數 8 2.3 調制光譜基本原理 15 2.4電場調制 19 2.5 弱電場調制 23 2.6 光壓效應 25 第三章 樣品結構與實驗裝置 27 3.1 樣品結構 27 3.2 光調制實驗 27 第四章 實驗結果與分析 31 4.1 氦氖雷射調制的實驗結果與分析 32 4.2 不同波長雷射調制的實驗結果與討論 62 4.3 不同濃度樣品的比較結果 70 第五章 結論與展望 80 參考文獻 82

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