The modification of phononic crystals by surface structuring allows obtaining a new parameter describing the dynamics of the structure produced in this way. We have investigated the dispersion relation of surface acoustic waves propagating in a phononic material which is based on nanometer-scale surface modulation using interconnected one-dimensional array of stripes and a two-dimensional array of pillars. The influence of these two array components on the dispersion relation has been determined experimentally (Brillouin light scattering) and theoretically (Finite Element Method). The interaction of these two nanostructures supports a new mode which is not observed in independent structures of pillars and stripes. The influence of the relative position of these two nanostructures on the frequency of the new mode has been determined.

中文翻译：

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基于一维/二维结构的声子晶体模式的产生

通过表面结构化对声子晶体的修改允许获得描述以这种方式产生的结构的动力学的新参数。我们已经研究了声子材料中传播的表面声波的色散关系，该声子材料基于纳米级表面调制，使用互连的一维条纹阵列和二维柱阵列。这两个阵列分量对色散关系的影响已通过实验（布里渊光散射）和理论（有限元方法）确定。这两种纳米结构的相互作用支持了一种在柱状和条纹的独立结构中未观察到的新模式。这两种纳米结构的相对位置对新模式频率的影响已经确定。