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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 江衍偉 | |
| dc.contributor.author | Shih-Chieh Wei | en |
| dc.contributor.author | 魏士傑 | zh_TW |
| dc.date.accessioned | 2021-06-13T16:34:12Z | - |
| dc.date.available | 2007-07-20 | |
| dc.date.copyright | 2005-07-20 | |
| dc.date.issued | 2005 | |
| dc.date.submitted | 2005-07-08 | |
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/38459 | - |
| dc.description.abstract | 本論文以模擬方式探討光子晶體平板微共振腔的輻射特性。我們使用時域有限差分法作為數值模擬的工具。主要分析兩種結構，其一為「空氣-光子晶體-空氣」的懸空光子晶體；其二為「空氣-光子晶體-基板」，即光子晶體微共振腔下面有基板的結構，這較接近實際的元件。首先我們探討電偶極源與輻射率的關係。我們把以時域有限差分法求得的輻射率與由電偶極矩及電場內積關係式計算而得的輻射率作一比較。接著探討萃取效率與電偶極源的關係。有了輻射率與萃取效率，便可算出等效萃取率。因此，只要知道輻射率與電偶極源的關係，我們就可以在一個共振腔中放置很多電偶極源。我們在光子晶體平板微共振腔中每一個分割點上都放置一個隨機指向的電偶極源，藉此模擬實際上發光二極體的自發放光情況。總之，本研究應有助於增加發光二極體的輻射效率，並可應用於顯示與照明方面。 | zh_TW |
| dc.description.abstract | In this thesis, the radiation characteristics of photonic crystal slab microcavitiyes are numerically investigated. We use the finite-difference time-domain method as a simulation tool. Two structures are analyzed. One is an “air- photonic crystal- air” free-standing photonic crystal slab microcavity, and the other is an “air- photonic crystal- substrate” photonic crystal slab microcavity with substrate, which is similar to a real device. First, we investigate the relation between the radiation rate and the dipole source. We compare the radiation rate calculated by finite-difference time-domain method and that calculated by an analytic formula involving an inner product between the dipole moment and the electric field intensity. Then, we investigate the relation between the extraction efficiency and the dipole source. By multiplying the radiation rate and the extraction efficiency, we can obtain the effective extraction rate. Therefore, as we know the relation between the radiation rate and the dipole source, we can set multiple dipole sources in a microcavity. To simulate the spontaneous emission of a light-emitting diode, a randomly oriented dipole source is launched at each Yee cell of a microcavity. This study is helpful for increasing the radiation efficiency of light-emitting diodes and may be useful to the applications of display and lighting. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-13T16:34:12Z (GMT). No. of bitstreams: 1 ntu-94-R92941062-1.pdf: 1406705 bytes, checksum: b2f0fd6de6e1903e2ff5a2c813bafac3 (MD5) Previous issue date: 2005 | en |
| dc.description.tableofcontents | Contents
Chapter 1 Introduction 1 1.1 Review of photonic crystals 1 1.2 Photonic crystal microcavities 2 1.3 Photonic crystal enhanced LEDs………………………3 1.4 Organization of the thesis……………………………...4 Chapter 2 Numerical Method 7 2.1 Problem geometry 7 2.2 Finite-difference time-domain method………………7 2.2.1 Introduction…………………………………………..…...7 2.2.2 Three-dimensional FDTD algorithms……………..….…..8 2.3 Definitions of parameters……………………………..12 2.4 Computation domain and excited source…………..…13 2.5 Relation between radiation rate and dipole source…………………………………………..14 Chapter 3 Simulation Results for a Free-Standing Photonic Crystal Slab Microcavity………...……….……………….16 3.1 L3 Photonic crystal slab microcavity 16 3.2 Relation between radiation rate and 17 3.3 Extraction efficiency and effective extraction rate 19 3.4 Multiple dipole sources…………………………………….21 Chapter 4 Simulation Results for a Photonic Crystal Slab Microcavity with Substrate 39 4.1 L5 Photonic crystal slab microcavity with substrate….39 4.2 Relation between radiation rate and ……………...40 4.3 Extraction efficiency and effective extraction rate……42 4.4 Multiple dipole sources……………………………..…44 Chapter 5 Conclusions 61 References…………………………………………………..63 | |
| dc.language.iso | en | |
| dc.subject | 光子晶體 | zh_TW |
| dc.subject | 微共振腔 | zh_TW |
| dc.subject | photonic crystal | en |
| dc.subject | microcavity | en |
| dc.title | 光子晶體平板微共振腔輻射特性之分析 | zh_TW |
| dc.title | Analysis of Radiation Characteristics of Photonic Crystal Slab Microcavities | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 93-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 楊志忠,張宏鈞,邱奕鵬 | |
| dc.subject.keyword | 光子晶體,微共振腔, | zh_TW |
| dc.subject.keyword | photonic crystal,microcavity, | en |
| dc.relation.page | 66 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2005-07-08 | |
| dc.contributor.author-college | 電機資訊學院 | zh_TW |
| dc.contributor.author-dept | 光電工程學研究所 | zh_TW |
| 顯示於系所單位： | 光電工程學研究所 | |
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