Controlling the dispersion of metamaterials in three dimensions
Controlling the dispersion of metamaterials in three dimensions
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DOI：
10.1098/rspa.2022.0194
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发表时间：
2022-07
期刊：
影响因子：
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通讯作者：
A. Adili;Yue Chen;R. Lipton;Shawn Walker
中科院分区：
文献类型：
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作者：
A. Adili;Yue Chen;R. Lipton;Shawn Walker
我们提供了一个平台来研究包裹体几何对三维超材料晶体的影响，以调整频率相关的有效性质，以控制先导阶色散行为。这种晶体是非磁性的，由所有的介电元件制成。该设计使用由介质的几何形状控制的亚波长共振来提供新的色散特性。我们通过数值计算超材料的有效张量来确定超材料呈现带隙的频率间隔，以及正常色散和双负色散的间隔。频率间隔可以通过调整晶体周期晶胞内介电夹杂物的几何形状和位置来明确控制。
We provide a platform to examine the effect of inclusion geometry on three-dimensional metamaterial crystals to tune frequency-dependent effective properties for control of leading order dispersive behaviour. The crystal is non-magnetic and made from all dielectric components. The design provides novel dispersive properties using subwavelength resonances controlled by the geometry of the media. We numerically calculate the effective tensors of the metamaterial to identify frequency intervals where the metamaterial exhibits band gaps as well as intervals of normal dispersion and double negative dispersion. The frequency intervals can be explicitly controlled by adjusting the geometry and placement of the dielectric inclusions within the period cell of the crystal.