论文标题
通过间隙诱导的衍射通道过渡在双层二进制元中通过间隙诱导的衍射通道转变可控的不对称光束分裂
Controllably asymmetric beam splitting via gap-induced diffraction channel transition in dual-layer binary metagratings
论文作者
论文摘要
在这项工作中，我们设计并研究了可行的双层二进制式甲板，可以通过几乎完美的性能来实现可控制的不对称变速箱和光束分裂。由于巧妙的几何形状配置，为Metagration系统设计只需要一个元原子。通过简单地控制双层Metagrats之间的气隙，可以很好地从不对称的传输转换为对称传输。工作原理在于间隙引起的衍射通道从相对方向出发的衍射通道跃迁。非对称/对称传输可以在特定频带中起作用，并且使用声学元面的方法比以前的方法相比，我们的方法具有简单设计和可调性的优势，并且显示出在波前操纵，噪声控制，噪声控制和声学二极管中应用的希望。
In this work, we designed and studied a feasible dual-layer binary metagrating, which can realize controllable asymmetric transmission and beam splitting with nearly perfect performance. Owing to ingenious geometry configuration, only one meta-atom is required to design for the metagrating system. By simply controlling air gap between dual-layer metagratings, high-efficiency beam splitting can be well switched from asymmetric transmission to symmetric transmission. The working principle lies on gap-induced diffraction channel transition for incident waves from opposite directions. The asymmetric/symmetric transmission can work in a certain frequency band and a wide incident range.Compared with previous methods using acoustic metasurfaces, our approach has the advantages of simple design and tunable property and shows promise for applications in wavefront manipulation,noise control and acoustic diode.
