一维层状二组元声子晶体的带隙研究  

Study on Transmission Characteristics of 1D Layered Binary Phononic Crystals

作　　者：唐启祥[1] 胡家光[1] 邱学云[1] 

机构地区：[1]文山学院信息科学学院,云南文山663000

出　　处：《安庆师范学院学报（自然科学版）》2015年第3期57-59,67,共4页Journal of Anqing Teachers College(Natural Science Edition)

基　　金：云南省教育厅科学研究基金项目(2014Y474);云南省科技计划青年项目(2014FD055)

摘　　要：运用传输矩阵法数值计算了弹性波分别通过不同晶格常数、不同组元厚度比和不同复合周期数的一维层状二组元声子晶体的透射率,确定了带隙的起止频率和宽度。结果显示,晶格常数增大,起止频率和带隙宽度均变小;厚度比增加,起始频率几乎不变,而截止频率和带隙宽度几乎成线性增加;周期数增加,起止频率和带隙宽度均几乎不变。Using the transfer matrix method, the transmission coefficients of elastic waves transmitting through the one - di- mensional layered binary phononie crystal have been numerically calculated for different lattice and thickness ratio of component and number of recombination periods. Furthermore, the start frequencies and cutoff frequencies and band gap width are calculat- ed. The results show that both the starting frequencies and the cutoff frequencies and the band gap width decrease with the lattice constant increasing. With the thickness ratio increasing, the starting frequencies are almost invariant, but the cutoff frequencies and the band gap width increase. However, the starting frequencies and the cutoff frequencies and the band gap width are almost invariant with the number of recombination periods increasing.

关 键 词：二组元 声子晶体 传输矩阵 透射率 带隙 

分 类 号：O471.1[理学—半导体物理]