氮化銦奈米柱之光學性質研究

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姓名

劉漢鈞(Han-Chun Liu) 查詢紙本館藏

畢業系所

物理學系

論文名稱

氮化銦奈米柱之光學性質研究
(Optical characteristics of InN nanorods)

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摘要(中)

本論文是利用拉曼光譜和光激發螢光光譜來分析探討氮化銦奈米柱的基本光學性質。
我們從室溫拉曼光譜發現氮化銦奈米柱的A1(LO)模態和E2(high) 模態能量位置跟氮化銦薄膜的差不多，而且隨著奈米柱直徑越小，拉曼光譜譜形會越不對稱，這是因為聲子侷限效應所造成的，再由聲子侷限效應模型去擬合拉曼光譜決定出奈米柱的直徑大小，發現和由SEM影像圖估計出來的直徑大小幾乎相符，最後再從峰值的能量位置，半高寬變化觀察奈米柱直徑的大小對拉曼光譜的影響。
而氮化銦奈米柱的低溫光激發螢光光譜峰值會隨著直徑的越小而往高能量偏移，經過理論計算證實是因為量子侷限效應的影響而產生的。

摘要(英)

We present results of Raman spectra and PL spectra to analyze the optical properties of InN nanorods.
We find that the raman peak energy of InN nanorods is almost the same as InN thin film, and when the diameter of InN nanorods decrease, raman spectra will asymmetric, this is phonon confinement effect, and we use this model to fit our raman spectra, try to fit the diameter of InN nanorods.
Finally, we find that the PL peak energy of InN nanorods will blue shift by decreasing the diameter of InN nanorods, this is quantum confinement effect.

關鍵字(中)

★ 光激發螢光光譜
★ 聲子侷限效應
★ 量子侷限效應
★ 拉曼光譜
★ 氮化銦
★ 一維奈米結構
★ 奈米柱

關鍵字(英)

★ phonon confinement
★ quantum confinement
★ PL
★ raman
★ nanostructure
★ InN
★ nanorods

論文目次

摘要......................................................i
ABSTRACT...............................................ii
誌謝....................................................iii
目錄.....................................................iv
圖目錄...................................................vi
第一章簡介..............................................1
第二章基本原理..........................................4
2-1 拉曼光譜..........................................4
2-2 聲子侷限效應......................................9
2-3 光激發螢光光譜...................................13
2-4 量子侷限效應.....................................16
第三章實驗裝置圖.......................................21
3-1 拉曼散射實驗裝置圖...............................21
3-2 光激發螢光光譜裝置圖.............................24
3-3 掃瞄式電子顯微鏡原理.............................27
第四章結果與討論.......................................28
4-1 氮化銦奈米柱樣品結構分析.........................28
4-2 拉曼光譜分析.....................................32
4-3 光激發螢光光譜分析...............................51
第五章結論.............................................57
參考文獻.................................................58
附錄A..................................................61

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指導教授

徐子民(Tu-Min Hsu)

審核日期

2006-7-7

推文