Point defect states of a hollow cylinder in two-dimensional phononic crystal  

作　　者：高晓薇 陈世波 陈建兵 郑勤红 杨海 

机构地区：[1]Physics Department,Kunming University [2]Department of Physics,Yunnan Normal University [3]Department of Information Management,Yunnan Normal University

出　　处：《Chinese Physics B》2012年第6期324-328,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant No. 10864009);the Natural Science Foundation of Yunnan Province,China (Grant No. 2008CD109);the State Key Program of the National Natural Science of China (Grant No. 50734007)

摘　　要：Point defect states in two-dimensional phononic crystal of a hollow mercury cylinder in a water host are studied. An improved plane expansion method combined with the supercell technique is used to calculate the band gaps and the pressure distribution at the defect position. The sonic pressure of defect modes shows that the waves are localized at or near the defect. As the filing fraction increases, more defect modes appear in the band gaps.Point defect states in two-dimensional phononic crystal of a hollow mercury cylinder in a water host are studied. An improved plane expansion method combined with the supercell technique is used to calculate the band gaps and the pressure distribution at the defect position. The sonic pressure of defect modes shows that the waves are localized at or near the defect. As the filing fraction increases, more defect modes appear in the band gaps.

关 键 词：phononic crystal point defect cavity defect hollow cylinder 

分 类 号：O735[理学—晶体学]