Comparison of the mechanism of gap formation for tri- and bi-component phononic crystal |
| |
Authors: | Zhao Hong-Gang Wen Ji-Hong Liu Yao-Zong Yu Dian-Long Wang Gang and Wen Xi-Sen |
| |
Institution: | Institute of Mechatronical Engineering, National University
of Defense Technology, Changsha 410073, China |
| |
Abstract: | Using an exact Mie scattering solution, this paper investigates the
mode conversions during the Mie scattering of a single bi- or
one-component sphere in unbounded epoxy. Then the formation
mechanism of the first complete gap in the corresponding tri- or
bi-component phononic crystal is investigated by the
multiple-scattering method. It is shown that the heavy density of
the scatterer plays an essential role in the Mie resonance and the
formation of the gaps for both types of the phononic crystals. For
the tri-component phononic crystal, the gap is mainly induced by the
Mie resonance of the single scatterer. For the bi-component phononic
crystal, the transverse wave (by mode-conversion during the Mie
scattering under a longitudinal wave incidence) is modulated by the
periodicity and governed by the Bloch theory, which induces the gap
cooperatively. |
| |
Keywords: | phononic crystal Mie
scattering multiple scattering band gap |
本文献已被 维普 等数据库收录! |
| 点击此处可从《中国物理 B》浏览原始摘要信息 |
| 点击此处可从《中国物理 B》下载免费的PDF全文 |
|