Localized Modes at Defects in Sonic Composites
Journal Title: Analele Universitatii "Eftimie Murgu" Resita. Fascicula de Inginerie - Year 2015, Vol 22, Issue 2
Abstract
The paper discusses a sonic composite with a linear defect. Such structures allow localization of modes in the vicinity of the line defect with propagation along this line. The material in the vicinity of the line behaves like frequency-specific mirrors. The waves are trapped in a virtual set of mirrors parallel to the defect line, and the propagation bounce back and forth between these mirrors. The mirrors localize waves within a finite region of the line defect, and modes are quantized into discrete frequencies. If a mode has a frequency in the gaps, then it must exponentially decay inside the material. In a similar fashion, if the materials have point defects, the waves can be localized at the surface in which these point defects are locatedntial growth.
Authors and Affiliations
Valerica Moşneguţu, Ligia Munteanu
Keywords
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