Linear-crossing metamaterials mimicked by multi-layers with two kinds of single negative materials
Linear-crossing metamaterials mimicked by multi-layers with two kinds of single negative materials
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用两种单负材料多层模拟线性交叉超材料
DOI：
10.1088/2515-7647/ab5ecb
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发表时间：
2020-01
期刊：
影响因子：
--
通讯作者：
Hong Chen
中科院分区：
文献类型：
--
作者：
Zhiwei Guo;Haitao Jiang;Hong Chen
等频轮廓的拓扑跃迁将为光与物质之间的相互作用提供强有力的控制。例如，等频轮廓从椭圆色散到双曲色散的转变可以导致许多有趣的光学现象，包括超分辨率、光开关和准直。最近发表的文献表明，在基于微波电路的超材料中，可以实现从金属型双曲色散到介电型双曲色散的另一种转变。特别是，过渡点对应于一类具有两个相交线性色散的新超材料，可称为线性交叉超材料（LCMMs）。由于线性色散，lcmm已被证明具有许多不寻常的特性，如定向传播和部分隐身效应的板聚焦。从这个角度来看，我们将证明ε负材料和μ负材料组成的多层结构可以在光学体制下模拟LCMM。在此基础上，我们研究了具有部分隐身效应的薄片成像。此外，我们还揭示了在LCMM的帮助下，可以通过点源实现具有自愈性的贝塞尔光束。结果表明，lcmm在50/50分束器、聚焦光束和非衍射光束等应用中非常有用。
The topological transition of an iso-frequency contour will provide a powerful control for the interaction between light and matter. For example the transition of iso-frequency contour from an elliptical dispersion to a hyperbolic dispersion can result in many interesting optical phenomena including super-resolution, optical switching and collimation. In recently published literature, it has been shown that another transition from the metal-type hyperbolic dispersion to dielectric-type hyperbolic dispersion can be realized in the microwave circuit-based metamaterials. Particularly, the transition point corresponds to a new class of metamaterials with two intersecting linear dispersions, which can be called linear-crossing metamaterials (LCMMs). Because of the linear dispersion, LCMMs have been demonstrated to possess many unusual properties such as directional propagation and slab-focusing with a partial cloaking effect. In this perspective, we will demonstrate that the multilayered structure composed of ε-negative material and μ-negative material can mimic the LCMM in the optical regime. Based on this effective LCMM, we study the slab-imaging with a partial cloaking effect. In addition, we reveal that with the aid of LCMM, the Bessel beam with self-healing can be realized by a point source. The results show that LCMMs would be very useful in a variety of applications such as 50/50 beam splitters, focusing and non-diffraction beams.
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