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系統識別號 U0026-1507201515395800
論文名稱(中文) 以磁場操控半導體-介電質多層結構傳播特性模擬研究
論文名稱(英文) Simulation Studies of Magnetically Controlled Wave Propagation in Semiconductor-dielectric Multi-layered Structures
校院名稱 成功大學
系所名稱(中) 光電科學與工程學系
系所名稱(英) Department of Photonics
學年度 103
學期 2
出版年 104
研究生(中文) 陳竑文
研究生(英文) Hong-Wun Chen
學號 L76021317
學位類別 碩士
語文別 中文
論文頁數 70頁
口試委員 指導教授-藍永強
口試委員-成柏翰
口試委員-劉文仁
中文關鍵字 表面電漿  磁化表面電漿  多層膜結構  超穎材料  負折射率 
英文關鍵字 Multi-layered  Surface Magnetoplasmons  Surface plasmons  subwavelength resolution  Metamaterial 
學科別分類
中文摘要 在本論文研究中,我們利用外加磁場的方式來控制表面電漿的特性,並且將其應用在半導體-介電質堆疊而成的多層膜結構上。多層膜結構可視為一非等向性材料,並且隨著不同方向及大小的外加磁場可具有不同的介電係數張量。但由於外加磁場產生電子迴旋運動(cyclotron motion)的關係,使其產生不對稱的現象,我們將以色散關係式來加以說明。
我們藉由選擇適合的方向以及調整適當的外加磁場大小來控制整體多層膜的材料特性,並將其和超解析透鏡結合,使其在不改變結構以及材料的情況下,可以在不同的波段達到次波長解析的效果。透過有限元素分析軟體COMSOL驗證了我們理論及方法的正確性,並且我們也可以使用不同大小的外加磁場來改變解析的能力,這是目前已被提出的超解析透鏡沒有辦法做到的。
英文摘要 The main idea of this investigation is to build a system to subwavelength imaging. By using transfer matrix method and the effective medium approach of the investigated components, the ability of breaking optical diffraction limitation is elucidated. Based on the derived theory results, the finite element method (FEM) based electromagnetic commercial software COMSOL is taken to prove the feasibility of this proposed device.
We proposed and analyze a multilayered Semiconductor-dielectric structure for subwavelength resolution at terahertz region by controlling the magnitude of external magnetic field. Our methodology provide a way to multi-functional material, real-time subwavelength imaging, and high-density optoelectronic components with considering the effects of abnormal diffraction feature.
論文目次 口試合格證明 I
中文摘要 II
英文摘要 III
致謝 IX
目錄 X
圖目錄 XII
第一章 緒論 1
1.1 繞射極限 2
1.2 左手材料簡介 4
1.3 多層膜結構(Multi-layered Structures)以及超解析透鏡(Super Lens) 6
1.4 研究動機 13
第二章 表面電漿及磁化表面電漿 14
2.1表面電漿(Surface plasmon)介紹 14
2.2金屬Drude Model 22
2.3磁化表面電漿(Surface Magnetoplasmons) 25
2.4介電係數(Dielectirc tensor) 26
第三章 模擬方法-有限元素分析(Finite Element Methods, FEM) 31
3.1有限元素分析的基本概念 31
3.2微分方程的弱形式(Weakform) 32
3.3有限元素分析-離散化 34
3.4有限元素方程式的求解 38
3.5有限元素分析軟體-COMSOL 40
第四章 磁控式解析透鏡 43
4.1設計理論-等頻率色散曲線 43
4.2結構設計與模擬 53
4.3可調式的解析透鏡 56
4.4外加磁場的影響-不對稱現象 59
第五章 結論 65
參考文獻 66
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