The manipulation of self-collimated beam in phononic crystals composed of orientated rectangular inclusions

Chia Nien Tsai, Lien Wen Chen

研究成果: Article同行評審

8 引文 斯高帕斯(Scopus)

摘要

Self-collimation is wave propagation in straight path without diffraction. The performance is evaluated by bandwidth, angular collimating range and straightness of equi-frequency contours. The present study aims to manipulate the self-collimated beam in square-array phononic crystals by means of orientated rectangular inclusions. Finite element simulations are performed to investigate the effects of the aspect ratio and orientation angle of rectangular inclusions on the self-collimated beam. The simulation results show that the proposed design successfully achieves all-angle self-collimation phenomenon. In addition, it also shows that the propagation direction of a self-collimated beam can be effectively manipulated by varying the orientation angle of inclusions. Numerical simulation result of the S-shaped bend demonstrates that acoustic collimated beam can be steered with negligible diffraction. Overall, the proposed design has significant potential for the realization of applications such as collimators, acoustic waveguides and other phononic crystals-based systems.

原文English
文章編號659
期刊Applied Physics A: Materials Science and Processing
122
發行號7
DOIs
出版狀態Published - 2016 七月 1

All Science Journal Classification (ASJC) codes

  • 化學 (全部)
  • 材料科學(全部)

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