General class of metamaterial transformation slabs
General class of metamaterial transformation slabs
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DOI：
10.1103/physrevb.81.125124
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发表时间：
2010-03-01
影响因子：
3.7
通讯作者：
Engheta, Nader
中科院分区：
文献类型：
--
作者：
Gallina, Ilaria;Castaldi, Giuseppe;Engheta, Nader
在这篇文章中，我们应用基于变换的光学方法来推导一类一般的透明超材料板。通过解析和数值全波研究，我们探索了它们的图像位移/形成能力，并与文献中已知的构型建立了有趣的联系。从这些修正出发，我们发展了一些非平凡的扩展，并说明了它们在基于双正(可能是非磁)介质的完美天线罩、防隐身装置和聚焦装置的设计中的可能应用。这些设计表明，这种反常特征可以在不一定依赖负折射率或强共振的超材料的情况下实现，这为这些器件的实现提供了更多的实用场所。
In this paper, we apply transformation-based optics to the derivation of a general class of transparent metamaterial slabs. By means of analytical and numerical full-wave studies, we explore their image-displacement/formation capabilities, and establish intriguing connections with configurations already known in the literature. Starting from these revisitations, we develop a number of nontrivial extensions, and illustrate their possible applications to the design of perfect radomes, anticloaking devices, and focusing devices based on double-positive (possibly nonmagnetic) media. These designs show that such anomalous features may be achieved without necessarily relying on negative-index or strongly resonant metamaterials, suggesting more practical venues for the realization of these devices.