%0 Journal Article %T Defect states in three-component phononic crystal
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
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
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