Recently, with the development of optically induced artificial magnetism, the Kerker effect has attracted renewed interest in various branches of nanophotonics. Here, we extend this effect into the acoustic system and present a rigorous analytical model for discussing the generalized Kerker conditions related to directional forward or backward scattering. A two-dimensional cylindrical acoustic Mie resonator with subwavelength scale is used as an example. Numerical simulations agree well with the generalized Kerker conditions related on the directional scatterings. The proposed concepts could encourage more comprehensive investigations on the Kerker effect in other fields, such as elastic waves, water waves.

最近，随着光致人工磁学的发展，克尔克效应重新引起了纳米光子学各个分支的兴趣。在这里，我们将这种效应扩展到声学系统中，并提出了一个严格的分析模型，用于讨论与定向前向或后向散射相关的广义 Kerker 条件。以亚波长尺度的二维圆柱声米氏谐振器为例。数值模拟与与定向散射相关的广义 Kerker 条件非常吻合。所提出的概念可以鼓励对其他领域的 Kerker 效应进行更全面的研究，例如弹性波、水波。