Realization of Complex 3-D Phononic Crystals With Wide Complete Acoustic Band Gaps
Realization of Complex 3-D Phononic Crystals With Wide Complete Acoustic Band Gaps
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DOI：
10.1109/tuffc.2016.2543527
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发表时间：
2016-05-01
影响因子：
3.6
通讯作者：
Vellekoop, Michael J.
中科院分区：
文献类型：
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作者：
Lucklum, Frieder;Vellekoop, Michael J.
声子晶体（PnCs）为声波传播提供了独特的能带结构。制造复杂的三维（3-D）PnCs允许具有超出二维（2-D）设计能力的复杂声子带结构的新类别的装置。我们已经成功地制造了新颖的3-D PnCs与1毫米晶格常数和最小特征尺寸低至100 μ m，使用高分辨率立体光刻印刷。在这里，我们报告的第一个理论计算和实验结果表明宽完整的3-D声子带隙不能达到相应的2-D结构具有相同的晶格几何形状。在400 kHz至1 MHz宽的频带内，纵向和剪切波传播被抑制超过-60 dB。
Phononic crystals (PnCs) offer unique band structures for acoustic wave propagation. Fabricating intricate three-dimensional (3-D) PnCs allows a new class of devices with complex phononic band structures beyond capabilities of two-dimensional (2-D) designs. We have successfully fabricated novel 3-D PnCs with 1-mm lattice constant and minimum feature sizes as low as 100 mu m using high-resolution stereolithography printing. Here, we report the first theoretical calculations and experimental results demonstrating wide complete 3-D phononic band gaps not attainable by corresponding 2-D structures with the same lattice geometry. Longitudinal and shear-wave propagation is suppressed by more than -60 dB in frequency bands as wide as 400 kHz to 1 MHz.