Title :
Negatively refracted transverse waves : study of the ultrasonic field at the exit of an elastic phononic crystal
Author :
Morvan, B. ; Tinel, A. ; Hladky-Hennion, A.C. ; Vasseur, J. ; Groby, J.P. ; Dubus, B. ; Djafari-Rouhani, B.
Author_Institution :
LOMC, Le Havre, France
Abstract :
A two-dimensional phononic crystal (PC) with square lattices composed of air holes in aluminum matrix is studied. The band structure of the PC exhibits some properties which allow the negative refraction of transverse wave transmitted through the PC. The left-handed behaviour of the PC is verified numerically with an emphasis on the process of refracted beam construction near the exit surface of the PC.
Keywords :
band structure; metamaterials; phononic crystals; ultrasonic refraction; ultrasonic waves; 2D phononic crystal; air holes; aluminum matrix; band structure; elastic phononic crystal exit; left-handed behaviour; negative refraction; negatively refracted transverse waves; square lattices; ultrasonic field; Aluminum; Crystals; Filtering; Frequency; Lattices; Phased arrays; Solids; Steel; Structural beams; Surface waves; Negative refraction; Phononic crystal; Transverse wave;
Conference_Titel :
Ultrasonics Symposium (IUS), 2009 IEEE International
Conference_Location :
Rome
Print_ISBN :
978-1-4244-4389-5
Electronic_ISBN :
1948-5719
DOI :
10.1109/ULTSYM.2009.5441694
