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一维准周期结构声子晶体透射性质的研究
引用本文:曹永军,董纯红,周培勤.一维准周期结构声子晶体透射性质的研究[J].物理学报,2006,55(12):6470-6475.
作者姓名:曹永军  董纯红  周培勤
作者单位:内蒙古师范大学物理与电子信息学院,呼和浩特 010022
摘    要:提出了一维准周期结构的声子晶体模型.对弹性波通过该一维准周期结构声子晶体的透射系数进行了数值计算,并与周期结构的透射系数进行了比较.计算结果表明,弹性波通过一维准周期结构声子晶体时,同样会有带隙的出现,且带隙所在频率范围与周期结构的情形完全一样,不同的是在准周期结构声子晶体中,带隙内有很强的局域共振模.对此局域模性质的研究有助于声波或弹性波滤波器的制作. 关键词: 准周期结构 声子晶体 局域化

关 键 词:准周期结构  声子晶体  局域化
文章编号:1000-3290/2006/55(12)/6470-06
收稿时间:4/6/2006 12:00:00 AM
修稿时间:2006-04-062006-06-20

Transmission properties of one-dimensional qusi-periodical phononic crystal
Cao Yong-Jun,Dong Chun-Hong,Zhou Pei-Qin.Transmission properties of one-dimensional qusi-periodical phononic crystal[J].Acta Physica Sinica,2006,55(12):6470-6475.
Authors:Cao Yong-Jun  Dong Chun-Hong  Zhou Pei-Qin
Institution:College of Physics and Electronics Information, Inner Mongolia Normal University, Huhhot 010022, China
Abstract:In this paper, the model of a one-dimensional (1D) phononic crystal with quasi-periodical structure is proposed. The transmission coefficients of elastic waves through the 1D qusi-periodical phononic crystal are numerically calculated, and the obtained transmission coefficients are compared with those of the phononic crystal with periodical structure. The results show that the band gap can also be found in the phononic crystal with quasi-periodical structure, and the frequency range of the gap is the same as that of the periodical structure. However, the only difference is that strongly localized resonant modes appear in the gap of the qusi-periodical phononic crystal. This study to the properties of the localized modes is useful to the fabrication of the acoustic or elastic wave filters.
Keywords:qusi-periodical structure  phononic crystal  localization
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