论文标题
具有嵌入式最新邻居耦合的元时间的声学表面模式
Acoustic surface modes on metasurfaces with embedded next-nearest neighbor coupling
论文作者
论文摘要
我们设计，模拟和实验表征了一个声学跨表面，其中包括一维开放的，声音，腔，腔，并以嵌入在表面下方的附加连接腔的形式下，以超越最新的邻居（BNN）耦合进行调节。隐藏的复杂结构很容易通过增材制造技术（3D打印）实现。受支持的局部声学表面波的分散性能受到BNN耦合提供的竞争功率流通道的影响，BNN耦合提供了极端的巨大光谱。该结构支持我们通过实验验证的负面分散的“向后”波。因此，这样的结构为通过声学跨面增强声学传感的途径提供了途径。
We design, simulate, and experimentally characterize an acoustic metasurface comprising of a 1D array of open, sound-hard, cavities, modulated with beyond-nearest-neighbor (BNN) couplings in the form of additional connecting cavities embedded beneath the surface. The hidden complex structure is realized readily with additive manufacturing techniques (3D printing). The dispersive properties of the supported localized acoustic surface waves are influenced by competing power-flow channels provided by the BNN couplings, that generate extrema in the dispersion spectra within the first Brillouin zone. The structure supports negatively dispersing 'backwards' waves that we experimentally verify. Such structures thereby provide a route to enhanced acoustic sensing by acoustic metasurfaces.
