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Negative refraction of longitudinal waves in an elastic phononic crystal

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8 Author(s)
Croenne, C. ; IEMN, CNRS, Villeneuve d''Ascq, France ; Hladky-Hennion, A.-C. ; Vasseur, J. ; Dubus, B.
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Two-dimensional phononic crystals (PC) with square or triangular lattices composed of steel rods in a polymer matrix are studied. The band structure of the PC exhibits several negative branches. Among them, one allows the negative refraction of longitudinal waves transmitted through the PC. The left-handed behaviour of the PC is exhibited numerically as well as experimentally, by using a prism shaped PC. Finally, a numerical simulation is presented, with the PC immersed in a fluid, for focusing applications.

Published in:

Ultrasonics Symposium (IUS), 2010 IEEE

Date of Conference:

11-14 Oct. 2010

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