Tessellated and stellated invisibility.
Tessellated and stellated invisibility.
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DOI：
10.1364/oe.17.013389
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发表时间：
2009-08
期刊：
影响因子：
3.8
通讯作者：
A. Diatta;A. Nicolet;S. Guenneau;F. Zolla
中科院分区：
文献类型：
--
作者：
A. Diatta;A. Nicolet;S. Guenneau;F. Zolla
我们推导了与二维多边形和星形斗篷相关的介电常数和磁导率各向异性异质矩阵的表达式。我们使用有限元数值显示，当我们增加后一种斗篷的边数时，前向散射会恶化，而前一种斗篷的前向散射会有所改善。使用严格的渐近方法讨论这种对抗行为。我们使用对称群理论方法来推导斗篷设计。
We derive the expression for the anisotropic heterogeneous matrices of permittivity and permeability associated with two-dimensional polygonal and star shaped cloaks. We numerically show using finite elements that the forward scattering worsens when we increase the number of sides in the latter cloaks, whereas it improves for the former ones. This antagonistic behavior is discussed using a rigorous asymptotic approach. We use a symmetry group theoretical approach to derive the cloaks design.