用于极端传感和隔离的滑动对称声波波导
Glide-Symmetric Acoustic Waveguides for Extreme Sensing and Isolation
摘要：
滑移对称性为设计周期性结构的特性提供了新的自由度，因而在各种电磁结构中得到了广泛的应用。然而，到目前为止，很少有人探讨的影响，滑移对称性可以提供在声学领域。在本文中，我们探讨滑动对称声波波导，突出其色散特性和引导性能，并展示在声学设备的背景下的机会。在这里，我们解析推导出他们的色散特性，采用半解析模式匹配技术。然后，我们演示了如何不寻常的色散特性的滑移对称声波波导可以用来实现非常尖锐的频率响应。基于这些结果，我们提出了一个传感平台的液体分析物，表现出大的灵敏度和线性。此外，通过引入流体运动，我们利用这些响应来设计基于声学Mach-Zehnder干涉法的声学隔离器，其设计在足迹和复杂性方面比其他不依赖于滑移对称性的声学非互易设备更有利。
英文摘要：
Glide symmetry offers new degrees of freedom to engineer the properties of periodic structures, and thus it has been exploited in various electromagnetic structures. However, so far there has been little exploration on the impact that glide symmetry can offer in the field of acoustics. In this paper, we explore glide-symmetric acoustic waveguides, highlighting their dispersion characteristics and guiding properties and demonstrating opportunities in the context of acoustic devices. Here we analytically derive their dispersive features applying a semi-analytical mode matching technique. We then demonstrate how the unusual dispersion properties of glide-symmetric acoustic waveguides can be used to achieve very sharp frequency responses. Based on these results, we propose a sensing platform for liquid analytes that exhibits large sensitivity and linearity. Furthermore, by introducing fluid motion, we leverage these responses to design an acoustic isolator based on acoustic Mach-Zehnder interferometry, whose design is more favorable in terms of footprint and complexity in comparison to other acoustic nonreciprocal devices that do not rely on glide symmetry.
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