Journal
SOLID STATE COMMUNICATIONS
Volume 130, Issue 1-2, Pages 67-71Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ssc.2004.01.007
Keywords
defect state; acoustic band-gap
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Using the supercell plane wave method, we investigated defect modes created by introducing a bend-shaped linear defect in a two-dimensional acoustic band-gap material consisting of water cylinders in mercury background. The bend-shaped linear defect is made up of the water cylinders with different size, and the size of the defect cylinders is shown to strongly influence the defect modes existing in the frequency regime of the gap. By analyzing the pressure field of defect modes, we found the waves are localized in the bend-shaped linear defect. It provides us a foundation in theory to design a bent waveguide in engineering application. (C) 2004 Elsevier Ltd. All rights reserved.
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