The Airy beam possesses some unusual properties, which are non-diffraction, self-healing, and a unique self-bending behavior. Previous works about metasurfaces have used geometric phase or plasma resonance to produce the Airy beam. However, the former requires a circular polarized light incident, while the latter has a large optical loss. In this paper, a polarization insensitive metasuface is designed to generate the Airy beam. It works in 635 nm, which is the working wavelength of the commonly used semiconductor laser. The nature of all-dielectric eliminates the ohmic loss improving the working efficiency of the metasurface. The efficiency of generating the Airy beam is approximately 58 %. Most important of all, the square nanopillar is easier to be realized in processing. The square structure can have a smooth side as in the case of processing equipment accuracy is not very high.

中文翻译：

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使用全介电超表面产生对偏振不敏感的艾里光束

艾里光束具有一些不寻常的特性，即无衍射，自愈和独特的自弯曲性能。先前有关超表面的工作已使用几何相位或等离子体共振来产生艾里光束。但是，前者需要入射圆偏振光，而后者具有较大的光损耗。本文设计了一种偏振不敏感的元表面来产生艾里光束。它在635 nm下工作，这是常用半导体激光器的工作波长。全电介质的性质消除了欧姆损耗，从而改善了超表面的工作效率。产生艾里光束的效率约为58％。最重要的是，方形纳米柱在加工中更容易实现。正方形结构可以具有光滑的侧面，因为在加工设备中精度不是很高。