Title :
Negative refraction of longitudinal waves in an elastic phononic crystal
Author :
Croënne, C. ; Hladky-Hennion, A.-C. ; Vasseur, J. ; Dubus, B. ; Bavencoffe, M. ; Morvan, B. ; Tinel, A. ; Manga, D.
Author_Institution :
IEMN, CNRS, Villeneuve d´´Ascq, France
Abstract :
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.
Keywords :
acoustic wave refraction; elastic waves; elasticity; filled polymers; numerical analysis; phononic crystals; steel; band structure; left-handed behaviour; longitudinal waves; negative refraction; numerical simulation; polymer matrix; square lattices; steel rods; triangular lattices; two-dimensional elastic phononic crystal; Acoustics; Crystals; Dispersion; Fluids; Lattices; Lenses; Steel; longitudinal wave; negative refraction; phononic crystals;
Conference_Titel :
Ultrasonics Symposium (IUS), 2010 IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4577-0382-9
DOI :
10.1109/ULTSYM.2010.5935582
