Sonic Gradient Index Lens in Water

Abstract

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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Document Details

Document Type
Technical Report
Publication Date
Jun 21, 2010
Accession Number
ADA523087

Entities

People

  • Daniel Torrent
  • Gregory J. Orris
  • Jose Sanchez-Dehesa
  • Liang-wu Cai
  • Michael Nicholas
  • Theodore P. Martin

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Acoustic Scattering
  • Acoustic Waves
  • Acoustics
  • Amplitude
  • Continuous Waves
  • Engineering
  • Equations
  • Experimental Data
  • Intensity
  • Measurement
  • Military Research
  • Nuclear Engineering
  • Refractive Index
  • Scattering
  • Stainless Steel
  • Wave Phenomena
  • Wave Propagation

Fields of Study

  • Physics

Readers

  • Calculus or Mathematical Analysis
  • Fluid Dynamics.
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