固-液结构声子晶体中弹性波的能带  

Energy Band of Elastic Wave in Photonic Crystal with Solid-Liquid Structure

作　　者：刘启能[1] 

机构地区：[1]重庆工商大学计算机科学与信息工程学院,重庆400067

出　　处：《材料导报》2008年第10期91-94,共4页Materials Reports

基　　金：重庆市教委科技项目基金资助(KJ080720);废油资源化技术与装备教育部工程研究中心基金(07011302)资助

摘　　要：为了研究弹性波在固-液结构声子晶体中的能带特性,推导出了弹性波斜入射固-液结构声子晶体的转移矩阵。利用它计算了固-液结构声子晶体中弹性波的透射系数。结果表明,当介质的分层厚度固定时,在透射波中出现了多级禁带,禁带的频率中心随入射角的增加而向高频方向移动。当入射角固定时,禁带的频率宽度随介质的分层厚度近似呈反比变化,禁带的频率中心也随介质的分层厚度近似呈反比变化。Inorder to study the energy band characteristics of the elastic wave in the phononic crystal with solid and liquid structure, the transfer matrix of the phononic crystal is deduced. Using the transfer matrix, the transmission coefficient of the elastic wave in the phononic crystal with solid-liquid structure is calculated. When the medium thickness is a fixed value, there are a number of the forbidden bands in the transmission wave. When the incidence an- gle increases the center frequency of the forbidden band increases. When the incidence angle is a fixed value, the width of the forbidden band varies inversely with the changes of the medium thickness. The center frequency of the forbidden band varies inversely with the changes of the medium thickness.

关 键 词：声子晶体 弹性波 转移矩阵 能带 

分 类 号：O77[理学—晶体学]