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Generalized Brillouin diagrams for evanescent waves in metamaterials with interelement coupling

机译:元素间耦合的超材料中e逝波的广义布里渊图

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摘要

A graphical representation for two-dimensional periodic structures is introduced that provides the full information contained in the dispersion equation: not only for the pass band but for the neighboring stop bands as well. It is a seamless natural extension of Brillouin diagrams obtained by adding eight new zones which incorporate the properties of evanescent waves. The accuracy of the infinite lattice approximation is tested both by simulations and experiments using magnetoinductive waves. For waves propagating in one direction and evanescent in the other direction, the results of the three different methods are shown to be in good agreement. The versatility of the new representation and its applicability to the design of near-field manipulating metamaterials is discussed.
机译:引入了二维周期结构的图形表示,该图形表示提供了色散方程中包含的全部信息:不仅对于通带,而且对于相邻的阻带。它是布里渊图的无缝自然扩展,它是通过添加八个包含zones逝波属性的新区域而获得的。无限晶格近似的准确性通过使用磁感应波的仿真和实验进行测试。对于在一个方向上传播而在另一个方向上渐逝的波,这三种不同方法的结果显示出很好的一致性。讨论了新表示的多功能性及其在近场操纵超材料设计中的适用性。

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