%0 Journal Article
%T Defect states in three-component phononic crystal<br>三组元声子晶体中的缺陷态
%A Li Xiao-Chun
%A Yi Xiu-Ying
%A Xiao Qing-Wu
%A Liang Hong-Yu
%A <br>李晓春
%A 易秀英
%A 肖清武
%A 梁宏宇
%J 物理学报
%D 2006
%I 
%X Using the supercell plane wave method, we investigated the effect of the third component material as defects modifying band structure of two-dimension two-component phononic crystal (PC). It is shown that adding the third material as point defect/linear defects in the two-component PC, defect states/bands can appear in the original band gap whose position and width would have only minor changes. The frequency of the defect states/bands are affected by the third material's characteristics; and all the defect states are localized. Therefore, adding proper third material as point/linear defects to the two-component system with wide band gap where defect states/bands will fall in, some special filtered/guided states will be formed. This property has important significance in acoustic /elastic wave propagating and new acoustic applications.
%K phononic crystals
%K three-component
%K point defect
%K linear defect<br>声子晶体
%K 三组
%K 点缺陷
%K 线缺陷
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=1A2CAA85377DB659&yid=37904DC365DD7266&vid=E514EE58E0E50ECF&iid=94C357A881DFC066&sid=9EFA9C0344D40E4A&eid=970CC462728303C3&journal_id=1000-3290&journal_name=物理学报&referenced_num=2&reference_num=16