1.3 um單模操作qL2光子晶體共振腔之設計與製作

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李淑萍(Shu-ping Lee) 查詢紙本館藏

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論文名稱

1.3 um單模操作qL2光子晶體共振腔之設計與製作
(Design and fabrication of 1.3 um single-mode operation quasi-L2 photonic crystal cavity)

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摘要(中)

摘要
近年來，光子晶體共振腔由於擁有高Purcell效應已被頻繁地使用以提升單光子源效率，利於未來量子密碼與通訊等應用。當光子晶體共振腔操作在單模的狀態，量子點產生的光子皆經由這單一的模態釋放出腔體，提升了量子點與模態的耦合效率有利達成高效率的光源。本研究使用的quasi-L2光子晶體共振腔體除了具有極低模態體積適合用以追求高Purcell效應外，更僅提供清晰可辨的三個模態以利於單模操作結構的設計。本研究進一步地對基本quasi-L2結構作幾何條件上的調變，成功地實現波長為1.3 ?m的單模操作quasi-L2光子晶體共振腔。實驗結果顯示，於品質因子1100且共振模態與量子點完全重合的情況下，量子點發光強度整整被提升70倍之多，極適合用以提升單光子源之效率。

摘要(英)

Abstract
In recent years, photonic crystal defect cavity is widely used to achieve high Purcell factor for high efficiency single photon sources. As the defect cavity is operated at single mode condition, all the photons generated inside the cavity are forced to funnel through this single mode and lead to enhanced coupling efficiency. Previous study shows that a quasi-L2 defect cavity offers not only three clearly resonant modes but also a very small mode-volume, which is essential for high Purcell effect. In this study, we adjust the geometric parameters of quasi-L2 photonic crystal defect cavity, and successfully realize a 1.3??m single mode photonic crystal cavity. For a cavity with quality factor of 1100, the quantum dot luminescence intensity is enhanced over 70 fold, demonstrating its potential of q-L2 photonic crystal cavity for high efficiency single photon sources and lasers.

關鍵字(中)

★ 光子晶體

關鍵字(英)

★ photonic crystal

論文目次

目錄
中文摘要 i
英文摘要 ii
目錄 iii
圖目錄 v
表目錄 ix
第一章導論 1
1-1 光子晶體導論 1
1-2 研究動機 3
第二章 qL2光子晶體共振腔基本特性分析 5
2-1 基本原理 5
2-2 光子晶體三維電場分布 6
2-3 qL2光子晶體模態體積計算 11
2-4 qL2光子晶體品質因子分析 16
2-5 結論 22
第三章單模操作qL2光子晶體共振腔設計 23
3-1 空間上調變空氣孔洞破壞qL2共振模態的駐波條件 23
3-1.1 調變Y軸方向空氣孔洞 24
3-1.2 第一層週期空氣孔洞尺寸增大 31
3-2 頻譜上調變光子晶體共振模態的基本原理 40
3-2.1 調變週期空氣孔洞半徑對光子能隙的影響 40
3-2.2 調變缺陷空氣孔洞幾何條件對共振模態的影響 42
3-2.3 調變週期空氣孔洞幾何條件對共振模態的影響 46
3-2.4 調變晶格常數的影響 48
3-3 頻譜上的調變 49
3-3.1 R’/a的調變 50
3-3.2 R/a的調變 51
3-4 結論 53
第四章單模操作qL2光子晶體光學特性 54
4-1 前言 54
4-2 單模操作qL2共振腔體元件製作流程 54
4-3 單模操作qL2共振腔體元件量測與分析 56
4-4 單模操作qL2結構量子點輻射生命週期 61
4-5 結論 64
第五章結論與未來展望 65
文獻參考 66

參考文獻

參考文獻
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指導教授

綦振瀛(Jen-inn Chyi)

審核日期

2009-7-16

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