Sonic Gradient Index Lens for Aqueous Applications

Details Sonic Gradient Index Lens for Aqueous Applications Sonic Gradient Index Lens for Aqueous Applications

2010-06-18

arxiv.org/abs/1006.3582v3

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.

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