Common optical metasurfaces are 2-dimensional functional devices composed of periodically arranged subwavelength constituents. Here, we achieved the positional-disorder-immune metasurfaces composed of core-shell cylinders which successively exhibit the magnetic dipole (MD) resonant, non-radiating anapole, and electric dipole (ED) resonant modes when their outer radii are fixed and the inner radii changes continuously in a range. The performances of the metasurfaces under a periodically structural design are not degraded even when the positions of the cylinders are subjected to random and considerable displacements. The positional-disorder-immunity is due to the weak non-local effect of the metasurfaces. Because the multiple scattering among cylinders is weak and insensitive to the spacing among the cylinders around the ED and MD resonant modes and vanishing irrespective of the spacing at the non-radiating anapole mode, the reflection properties including the reflection phase and reflectivity of the metasurfaces are insensitive to the spacing between neighboring cylinders for this entire variation range of the inner radius. The positional-disorder-immunity make the metasurface to be adapted to some unstable and harsh environments.

中文翻译：

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具有表现出anapole模式的成分的无序免疫超表面

常见的光学超表面是由周期性排列的亚波长成分组成的二维功能器件。在这里，我们实现了由核壳圆柱体组成的位置障碍免疫超表面，当它们的外半径固定且内径固定时，这些超表面依次表现出磁偶极子 (MD) 谐振、非辐射同极子和电偶极子 (ED) 谐振模式。半径在一个范围内不断变化。即使圆柱体的位置受到随机和相当大的位移，在周期性结构设计下超表面的性能也不会降低。位置障碍免疫是由于超表面的弱非局部效应。由于圆柱体之间的多次散射很弱，并且对 ED 和 MD 谐振模式周围的圆柱体之间的间距不敏感，并且无论在非辐射对极模式下的间距如何都会消失，因此包括反射相位和超表面反射率在内的反射特性为对于整个内半径变化范围，对相邻圆柱之间的间距不敏感。位置障碍免疫使超表面能够适应一些不稳定和恶劣的环境。