一维三组元准周期结构声子晶体的透射性质  

Transmission Properties of One-Dimensional Three-Component Quasi-Periodical Structure Phononic Crystals

作　　者：杨旭[1] 王立勇[1] 杜晓东[1] 曹永军[1] 

机构地区：[1]内蒙古师范大学物理与电子信息学院,内蒙古呼和浩特010022

出　　处：《内蒙古师范大学学报（自然科学汉文版）》2010年第4期363-366,共4页Journal of Inner Mongolia Normal University(Natural Science Edition)

基　　金：内蒙古高等学校科学技术研究项目(NJ09037);内蒙古师范大学研究生科研创新基金项目(CXJJS08001);内蒙古师范大学科研基金项目(ZRYB08016)

摘　　要：构造了一维三组元类Fibonacci、广义Fibonacci准周期结构声子晶体模型,研究弹性波在其中的传播和局域行为.对弹性波通过一维三组元复合结构声子晶体的透射系数进行数值计算,并与一维二组元复合结构声子晶体的透射系数作比较.结果表明:一维三组元准周期结构声子晶体可以获得比二组元复合结构声子晶体更宽的带隙,而且在带隙内有丰富的局域模式存在;三组元广义Fibonacci准周期结构声子晶体可用于弹性波/声波滤波器件的制作材料.In this paper,the model of one-dimensional（1D） three-component quasi-periodical phononic crystal including Fibonacci-class and generalized Fibonacci are firstly proposed.The transmission coefficients of the elastic waves through the 1D three-component quasi-periodical phononic crystal are numerically calculated,and the obtained transmission coefficients are compared with those of the phononic crystals with periodical structure and with duality quasi-periodical structure.The results show that the large gap and the strongly localized resonant modes can also be found in band structure of the phononic crystals with the three-component quasi-periodical structure.The quasi-periodical structure phononic crystals could be used as the fabricating materials of elastic wave filters.

关 键 词：声子晶体 带结构 局域化 

分 类 号：O417.1[理学—理论物理]