Ultra-Broadband Bending Beam and Bottle Beam Based on Acoustic Metamaterials

Applied Sciences

Xiaolong Huang¹  Chunsheng Weng¹  Can Li¹  Ning Li¹  Xudong Fan¹  Yang Kang¹ 

[1] National Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing 210094, China;

关键词: acoustic metamaterials;    bending beams;    bottle beams;    particle manipulations;   

DOI  :  10.3390/app12063025

来源: DOAJ

【 摘 要 】

We report the realization of an ultra-broadband bending beam based on acoustic metamaterials by the theoretical prediction and the numerical validation. The proposed structure is composed of a series of straight tubes with spatially modulated depths. We analytically derive the depth profile required for the generation of an ultra-broadband bending beam, and examine the performance of the metastructure numerically. The design is then extended for the generation of a three-dimensional bottle beam. The transverse trapping behaviours on small rigid objects by the bottle beam are investigated based on the force potential. Our work will help the further study of broadband acoustic meta-structures, and may also find applications in a variety of fields such as ultrasound imaging, health monitoring and particle manipulations.

【 授权许可】

Unknown