超材料
声学超材料
非线性系统
声学
双线性插值
谐波
带隙
声波
物理
光学
凝聚态物理
计算机科学
量子力学
计算机视觉
作者
Shiqi Liang,Jiehui Liu,Yun Lai,Xiaozhou Liu
出处
期刊:Chinese Physics B
[IOP Publishing]
日期:2022-10-05
卷期号:32 (4): 044301-044301
被引量:6
标识
DOI:10.1088/1674-1056/ac9783
摘要
Nonlinear phononic crystals have attracted great interest because of their unique properties absent in linear phononic crystals. However, few researches have considered the bilinear nonlinearity as well as its consequences in acoustic metamaterials. Hence, we introduce bilinear nonlinearity into acoustic metamaterials, and investigate the propagation behaviors of the fundamental and the second harmonic waves in the nonlinear acoustic metamaterials by discretization method, revealing the influence of the system parameters. Furthermore, we investigate the influence of partially periodic nonlinear acoustic metamaterials on the second harmonic wave propagation, and the results suggest that pass-band and band-gap can be transformed into each other under certain conditions. Our findings could be beneficial to the band gap control in nonlinear acoustic metamaterials.
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