Physics – Condensed Matter – Materials Science
Scientific paper
2010-06-18
Appl. Phys. Lett. 97, 113503 (2010)
Physics
Condensed Matter
Materials Science
10 pages, 4 figures
Scientific paper
10.1063/1.3489373
We study the acoustic scattering properties of a phononic crystal designed to behave as a gradient index lens in water, both experimentally and theoretically. The gradient index lens is designed using a square lattice of stainless-steel cylinders based on a multiple scattering approach in the homogenization limit. We experimentally demonstrate that the lens follows the graded index equations derived for optics by mapping the pressure intensity generated from a spherical source at 20 kHz. We find good agreement between the experimental result and theoretical modeling based on multiple scattering theory.
Cai Liang-Wu
Martin Theodore P.
Nicholas Michael
Orris Gregory J.
Sanchez-Dehesa Jose
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