Bioinspiration has widely been demonstrated to be a powerful approach for the design of innovative structures and devices. Recently, this concept has been extended to the field of elasticity, dynamics, and metamaterials. In this paper, we propose a seashell-inspired metasensor that can simultaneously perform spatial frequency mapping and act as a polarizer. The structure emerges from a universal parametric design that encompasses diverse spiral geometries with varying circular cross sections and curvature radii, all leading to tonotopic behavior. Adoption of an optimization process leads to a planar geometry that enables us to simultaneously achieve tonotopy for orthogonally polarized modes, leading to the possibility to control polarization as well as the spatial distribution of frequency maxima along the spiral axis. We demonstrate the versatility of the device and discuss the possible applications in the field of acoustics and sensing.

中文翻译：

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受贝壳启发的偏振敏感音调元传感器

生物启发已被广泛证明是设计创新结构和设备的强大方法。最近，这个概念已扩展到弹性、动力学和超材料领域。在本文中，我们提出了一种受贝壳启发的元传感器，它可以同时执行空间频率映射并充当偏振器。该结构采用通用参数化设计，包含具有不同圆形横截面和曲率半径的多种螺旋几何形状，所有这些都会导致音调行为。采用优化过程产生的平面几何结构使我们能够同时实现正交偏振模式的音调，从而可以控制偏振以及沿螺旋轴的频率最大值的空间分布。我们展示了该设备的多功能性，并讨论了在声学和传感领域的可能应用。