Abstract Materials with negative permittivity are opaque for electromagnetic wave such that the transmitted signal cannot travel through them. To combat this phenomenon, we propose a novel high transmission mechanism using periodic placed split-ring resonators and metallic wires to construct a transparent sandwich structure. This structure consists of three layers of materials, where the material with negative permittivity is sandwiched between the materials with high permittivity. With the given frequency, we firstly exploit the metallic wires and split-ring resonators to attain non-transparent negative permittivity and high permittivity, respectively. By effective medium theory, effective relative permittivity retrieved from these materials’ S parameters is verified to be negative or high. Then a resonant tunneling of electromagnetic fields occurs in the proposed three-layer sandwich structure. Simulated and measured results show that this structure fulfills high transmission, although each single material layer is nearly opaque. In addition, this high transmission mechanism is characterized by strong magnetic field coupling and an optimized coupling distance. The high transmission phenomenon and resonant tunneling mechanism provide an idea of reference to realize perfect transmission through opaque materials, which is also realizable in infrared or optical regimes with appropriate designs.

中文翻译：

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基于强磁场耦合的负介电常数材料的高透射率

摘要 具有负介电常数的材料对电磁波是不透明的，因此传输的信号不能通过它们。为了对抗这种现象，我们提出了一种新颖的高传输机制，使用周期性放置的开环谐振器和金属线来构建透明的夹层结构。这种结构由三层材料组成，其中具有负介电常数的材料夹在具有高介电常数的材料之间。在给定的频率下，我们首先利用金属线和裂环谐振器分别获得不透明的负介电常数和高介电常数。通过有效介质理论，从这些材料的 S 参数中反演的有效相对介电常数被证实为负或高。然后在所提出的三层夹层结构中发生电磁场的共振隧穿。模拟和测量结果表明，尽管每个单一材料层几乎不透明，但这种结构实现了高透射率。此外，这种高传动机构的特点是磁场耦合强，耦合距离优化。高透射现象和共振隧穿机制为通过不透明材料实现完美透射提供了参考思路，这也可以通过适当的设计在红外或光学领域实现。这种高传动机构的特点是强磁场耦合和优化的耦合距离。高透射现象和共振隧穿机制为通过不透明材料实现完美透射提供了参考思路，这也可以通过适当的设计在红外或光学领域实现。这种高传动机构的特点是强磁场耦合和优化的耦合距离。高透射现象和共振隧穿机制为通过不透明材料实现完美透射提供了参考思路，这也可以通过适当的设计在红外或光学领域实现。