具指向性微結構之設計

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姓名

簡智偉(Chih-Wei Chien) 查詢紙本館藏

畢業系所

光電科學與工程學系

論文名稱

具指向性微結構之設計
(The Study of Micro-Structured Arrays with High Directionality)

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摘要(中)

本論文中，我們利用有限時域差分法，來分析微米以下週期性結構之繞射特性，並針對藍光Thin-GaN LED設計具指向性之繞射光學結構。論文內容主要分為兩大部分：(一) 在數值計算上，我們將以有限時域差分法做為主要計算方法，並分析不同結構參數對指向性之貢獻與影響。(二) 以此優化之週期性結構參數做二維排列，進而設計具指向性、高效率藍光Thin-GaN LED。

摘要(英)

In this thesis, we apply finite-difference time domain algorithm to analyze the characteristic of diffraction of the sub-wavelength periodic structure. Accordingly, we design optical diffraction structures with high directionality for Thin-GaN blue LED.
The content of this thesis can be divided into two parts: a.)In numerical calculation, we use finite-difference time domain algorithm to calculate the directionality of various structures, and try to optimize the structure. b.)According to the optimized result, we extend the structure to a two-dimensional form. Finally we try to design the structure for a Thin-GaN blue LED with high directionality and high efficiency.

關鍵字(中)

★ 發光二極體
★ 微結構
★ 指向性

關鍵字(英)

★ Light emitting diode
★ Directionality
★ Micro-structured

論文目次

摘要 I
ABSTRACT II
誌謝 III
目錄 IV
圖索引 VII
表索引 XIII
第一章緒論 1
1.1 LED固態照明 1
1.2 LED應用於高準直性光學系統之優勢 3
1.3 論文架構及大綱 7
第二章 LED光源特性之探討 8
2.1 LED 發光原理 8
2.2 LED 發光效率 10
2.2.1　基本名詞介紹 10
2.2.2 利用微結構提升發光效率 13
2.3 LED發光光場與光型 19
2.4 光型調制之背景介紹 23
第三章次波長結構特性分析 28
3.1 基本原理介紹 28
3.1.1 繞射原理 28
3.1.2 有限時域差分法 31
3.1.3 完美吸收邊界介紹 35
3.2 一維結構之特性分析 36
3.2.1 結構週期對正向光萃取之影響 36
3.2.2孔洞直徑調制 48
3.2.3 孔洞深度調制 51
3.3 一維結構之遠場分佈 52
第四章次波長結構用於LED之設計 61
4.1 前言 61
4.2 光源佈局方法 61
4.3 二維結構之排列方式 66
4.3.1三角晶格排列 66
4.3.2四角晶格排列 69
4.3.3 A7準光子晶體排列 72
4.4 遠場分佈之模擬結果 77
4.5 LED指向性與效率分析 80
第五章結論 88
參考文獻 89
中英文名詞對照表 93

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指導教授

孫慶成(Ching-Cherng Sun)

審核日期

2008-7-18

推文