在2006年和2009年，兩個研究團隊分別提出了兩種隱形斗蓬裝置 - internal cloak 以及 external cloak，這兩種裝置都能夠使物體達到隱形的效果，然而他們各自也都會受到一些使用上的限制。舉例來說，internal cloak的工作原理是將電磁波偏折而繞過中心的隱藏區域，因此在裝置內被隱藏的物體無法與外界交換任何的訊號而變得如同盲人一般；另一方面，external cloak應用了散射場抵銷(scattering cancelation)的概念，因此需要客製化的設計，同時被隱藏物體的移動也被有所限制。
在本論文中，我們期望能夠設計出一種非常類似於小說中哈利波特的隱形斗篷的隱形裝置；確切地說，此種隱形裝置不需要客製化即能夠隱藏任意的物體，同時隱藏物體的視覺以及移動不會受到此隱形裝置的限制。
首先，我們利用有限元素分析法進行模擬以驗證提出的理論，其模擬結果與理論預測相當吻合，但是由於在現實中沒有材料可以達到理論所提出的連續的本構參數(constitutive parameters)，因此，為了設計出能夠實際應用的裝置，我們再次利用有限元素分析法模擬找出將裝置分層的最佳方式，並且利用有限積分法模擬以設計裝置中各個區域的本構參數，最後的模擬結果驗證了我們所提出的介電環超穎材料隱形斗蓬裝置。
最後，為了以實驗驗證模擬的結果，我們以氧化鋯圓環組成隱形裝置的結構，為了測試其電磁波特性，我們架設了平面波導裝置並且將隱形斗篷置於平面波導之中，接著量測電磁波在平面波導的分佈做出場圖。實驗量測的結果與模擬十分接近，但是由於實際的量測會受到試片公差或是邊界條件的誤差這些因素的影響，因此在場途中我們仍然會在隱形斗篷的周圍發現少許的散射場；然而我們認為一旦實驗中的條件能夠完全符合模擬中的設定時，我們即能夠達到相當接近哈利波特隱形斗篷的隱形裝置。

摘要 i
Abstract ii
Acknowledgements iv
Contents v
List of Figures vii
List of Tables xii
Chapter 1 Introduction 1
1.1 Introduction to Metamaterials 1
1.2 Introduction to Invisible cloaking 3
1.3 Thesis organization 4
Chapter 2 Literature Review 6
2.1 Transformation optics 6
2.2 Internal cloak 9
2.2.1 Theoretical Analysis of the perfect cylindrical cloak 9
2.2.2 Simplification of Material Parameters 11
2.2.3 Simulations and Experimental Verifications of the Internal Cloak 12
2.3 External cloak 15
2.3.1 Complementary Media and Superlens 15
2.3.2 Theoretical analysis of the external cloak 18
2.4 Other cloaks based on transformation optics 24
Chapter 3 Design and Simulation 30
3.1 Introduction 30
3.2 Harry Potter's Invisible Cloak 31
3.2.1 Theoretical Analysis and Simulations of the proposed Cloak 31
3.2.2 An Illusion Device based on Proposed Cloak 40
3.3 Numerical Simulation to Stratify the Cloak 42
3.3.1 Stratification of the Cloak by FEM Simulations 42
3.3.2 The Cloak Based on Dielectric Cuboid Metamaterials 47
3.3.3 The Cloak based on Dielectric Annulus Metamaterials 52
3.4 Summary 57
Chapter 4 Measurement and Discussion 59
4.1 Construction of the Cloak Structure 59
4.2 Measurement Setup 63
4.3 Result and Discussion 66
4.3.1 Measurement Results and Field Maps for Different Cases 66
4.3.2 Summary 73
Chapter 5 Conclusion 75
Reference 76

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