A Rigorous Analysis of Plane-Transformed Invisibility Cloaks
| Autor: | Hongsheng Chen, Lixin Ran, Yu Luo, Bae-Ian Wu, Jin Au Kong, Jingjing Zhang |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Permittivity
Physics Invisibility business.industry Scattering Cloak FOS: Physical sciences Physics::Optics Metamaterial Conical surface Physics::Classical Physics Electromagnetic radiation Physics::Popular Physics Optics Electrical and Electronic Engineering business Physics - Optics Optics (physics.optics) Ground plane |
| Zdroj: | IEEE Transactions on Antennas and Propagation. 57:3926-3933 |
| ISSN: | 1558-2221 0018-926X |
| Popis: | The electromagnetic characteristics of plane-transformed invisibility cloaks are quantitatively studied in this paper. We take elliptical cylindrical cloak as the example, and use an elliptical cylindrical wave expansion method to obtain the scattered field. It is demonstrated that an ideal elliptical cylindrical cloak is inherently visible. Noticeable field scattering and penetration will be induced when the cloak is exposed directly to an electromagnetic wave. However, as long as the cloak consists of a perfect electric conducting lining at the interior surface, perfect invisibility can still be achieved along the direction parallel to the major axis of the cloak for transverse magnetic illumination. Another plane-transformed cloak with a conical geometry is also proposed. The advantage of this cloak is that all the permittivity and permeability elements are spatially invariant while none of them is singular. Hence, it is easily realizable with artificially structured metamaterials. Finally, we show that this kind of cloak can also be used to cloak objects on a flat ground plane. Comment: 25 pages, 8 figures |
| Databáze: | OpenAIRE |
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