| 江卫锋,殷鸣,殷国富,向召伟,邓珍波.固/固型二维正方晶格声子晶体缺陷态研究*[J].,2016,35(5):410-416 |
| 固/固型二维正方晶格声子晶体缺陷态研究* |
| Investigation of defect modes for two-dimensional solid/solid phononic crystals with square lattice |
| 投稿时间：2015-12-30 修订日期：2016-08-10 |
| 中文摘要: |
| 利用有限元方法对存在缺陷的二维正方晶格金/环氧树脂声子晶体进行了研究,数值计算结果表明弹性波在点缺陷处局域,带隙中出现多条缺陷模,点缺陷数目的增加对声子晶体局域特性产生显著影响；弹性波沿着线缺陷传播形成波导,改变线缺陷结构可以改变弹性波传播方向和实现信号的分离。对声子晶体缺陷特性的研究可为声学滤波器和波导等器件的设计提供参考。 |
| 英文摘要: |
| The two-dimensional gold/expoxy phononic crystal in square lattice with defects are investigated using the finite element method .The numerical results show that elastic wave locates in point defect,and defect modes present in band gaps and the increase of the number of point defects significantly affects the localized modes of cavities.The elastic wave propagates along the line defect formatting waveguide and the change of the line defect structure can change the direction of elastic wave propagation and separate the signal.The research on the defect characteristics of the phononic crystal can provide a reference for the design of acoustic filters and waveguides. |
| DOI：10.11684/j.issn.1000-310X.2016.05.005 |
| 中文关键词: 声子晶体,点缺陷,线缺陷,有限元法 |
| 英文关键词: Phononic crystals, Point defect, Line defect, The finite element methods |
| 基金项目:国家自然科学基金项目编号：(51075419)和四川省科技支撑计划项目（编号：2016GZ0195）资助 |
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