论文标题
隐身和平衡材料，用于取消散射和波扩散
Stealth and equiluminous materials for scattering cancellation and wave diffusion
论文作者
论文摘要
我们报告了一个具有规定散射特性的二维声学结构的程序。这些结构是根据相互空间中的靶向特性设计的，以便它们的结构因子（即它们在天生近似下的散射模式）恰好遵循一组波长的所需散射特性。结构是由嵌入空气中的刚性圆形横截面圆柱的分布制成的。我们通过设计具有宽带反向散射抑制的二维隐形声学材料来证明该过程的效率，与出入射角和平衡的声学材料无关，表现出同等强度的宽带散射，也与入射角无关。散射强度是用单个和多个散射形式主义来描述的，彼此均显示出极好的一致性，从而验证了每种材料的散射特性。
We report a procedure to design 2-dimensional acoustic structures with prescribed scattering properties. The structures are designed from targeted properties in the reciprocal space so that their structure factors, i.e., their scattering patterns under the Born approximation, exactly follow the desired scattering properties for a set of wavelengths. The structures are made of a distribution of rigid circular cross-sectional cylinders embedded in air. We demonstrate the efficiency of the procedure by designing 2-dimensional stealth acoustic materials with broadband backscattering suppression independent of the angle of incidence and equiluminous acoustic materials exhibiting broadband scattering of equal intensity also independent of the angle of incidence. The scattering intensities are described in terms of both single and multiple scattering formalisms, showing excellent agreement with each other, thus validating the scattering properties of each material.
