One path to acoustic cloaking

Journal Article (Journal Article)

A complete analysis of coordinate transformations in elastic media by Milton et al has shown that, in general, the equations of motion are not form invariant and thus do not admit transformation-type solutions of the type discovered by Pendry et al for electromagnetics. However, in a two-dimensional (2D) geometry, the acoustic equations in a fluid are identical in form to the single polarization Maxwell equations via a variable exchange that also preserves boundary conditions. We confirm the existence of transformation-type solutions for the 2D acoustic equations with anisotropic mass via time harmonic simulations of acoustic cloaking. We discuss the possibilities of experimentally demonstrating acoustic cloaking and analyse why this special equivalence of acoustics and electromagnetics occurs only in 2D. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.

Full Text

Duke Authors

Cited Authors

  • Cummer, SA; Schurig, D

Published Date

  • March 2, 2007

Published In

Volume / Issue

  • 9 /

International Standard Serial Number (ISSN)

  • 1367-2630

Digital Object Identifier (DOI)

  • 10.1088/1367-2630/9/3/045

Citation Source

  • Scopus