Open AccessDefect states in three-component phononic crystal
Author(s) -
Xiaochun Li,
Xiuying Yi,
Xiao Qing-Wu,
Liang Hong-Yu
Publication year - 2006
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.55.2300
Subject(s) - supercell , crystallographic defect , band gap , materials science , crystal (programming language) , component (thermodynamics) , condensed matter physics , position (finance) , plane (geometry) , point (geometry) , plane wave , optics , physics , geometry , quantum mechanics , thunderstorm , meteorology , computer science , economics , programming language , mathematics , finance
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.