Abstract

A 2D problem of electromagnetic plane wave scattering by 1D-periodic structures with cylindrical elements of electromagnetic black hole type arranged on a semi-infinite substrate is considered. Two algorithms corresponding to the cases of E- and H-polarization are developed on the basis of the hybrid projection method with accounting for refractive index distributions in the black holes of different types. The algorithms are also generalized on the case of arrangement of the black holes on a perfectly conducting screen. A number of numerical results characterizing both the effectiveness of the algorithms themselves and the performance of the absorbing structures with black holes are presented. The characteristics of absorption in the indicated structures are compared to the similar characteristics corresponding to the structures with wedge-shaped elements.

中文翻译：

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圆柱电磁黑洞形成的吸收周期结构分析

摘要

考虑了将电磁黑洞型圆柱体布置在半无限基板上的一维周期结构对电磁平面波的二维散射问题。在混合投影方法的基础上，针对不同类型的黑洞中的折射率分布，开发了两种对应于E极化和H极化情况的算法。该算法还针对黑洞在完全导电的屏幕上的排列情况进行了概括。给出了许多数值结果，这些结果既表征了算法本身的有效性，又表征了带有黑洞的吸收结构的性能。