We observe maxon-like dispersion of ultrasonic guided waves in elastic metamaterials consisting of a rectangular beam and an array of cylindrical resonators. The pillars act as asymmetric resonators that induce a strong modal hybridization. We experimentally observe the strongly localized maxon mode with zero group velocity. Our study also demonstrates a unique feature of the maxon with a down-shifting peak frequency in space. To reveal the fundamental mechanism, we conduct comprehensive numerical studies on all frieze group symmetries and key geometric parameters.

中文翻译：

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弹性超束中类maxon超声的观察

我们观察到由矩形梁和圆柱形谐振器阵列组成的弹性超材料中超声波导波的类 maxon 色散。这些柱子充当不对称谐振器，引发强模态杂交。我们通过实验观察了群速度为零的强局域 maxon 模式。我们的研究还展示了 maxon 的独特特征，即在空间中峰值频率下移。为了揭示其基本机制，我们对所有楣组对称性和关键几何参数进行了全面的数值研究。