论文标题
设计跨侧来操纵天线辐射
Designing Metasurfaces to Manipulate Antenna Radiation
论文作者
论文摘要
从传感到光学计算的几种下一代技术，纳米级在纳米级的光操作是对光线的关键。操纵光线的一种方法是设计以分离材料构造的材料，具有一些所需的散射效果。超材料通常具有大量的几何参数，可以调节，从而使设计过程变得困难。现有的设计范例要么忽略自由度，要么依靠数字上昂贵的全波模拟。在这项工作中，我们得出了一种简单的半分析方法，用于设计由电和磁偶极子共振的子波长元素构建的超材料。这与几个实验可访问的制度有关。为了证明我们方法的多功能性，我们将其应用于三个问题：对附近发射器之间的耦合操纵，将平面波聚焦到一个点并设计具有特定辐射模式的介电天线。
Designer manipulation of light at the nanoscale is key to several next-generation technologies, from sensing to optical computing. One way to manipulate light is to design a material structured at the sub-wavelength scale, a metamaterial, to have some desired scattering effect. Metamaterials typically have a very large number of geometric parameters that can be tuned, making the design process difficult. Existing design paradigms either neglect degrees of freedom or rely on numerically expensive full-wave simulations. In this work, we derive a simple semi-analytic method for designing metamaterials built from sub-wavelength elements with electric and magnetic dipole resonances. This is relevant to several experimentally accessible regimes. To demonstrate the versatility of our method, we apply it to three problems: the manipulation of the coupling between nearby emitters, focusing a plane wave to a single point and designing a dielectric antenna with a particular radiation pattern.
