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Proceedings Paper

Funneled focusing of planar acoustic waves utilizing the metamaterial properties of an acoustic lens
Author(s): E. Walker; D. Reyes; M. M. Rojas; A. Krokhin; A. Neogi
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Paper Abstract

Metamaterial acoustic lenses are acoustic devices based on phononic crystal structures that take advantage of negative or near-zero indices of refraction. These unique properties arise due to either the antiparallel direction of the phase and group velocity or strongly anisotropic dispersion characteristics, usually above the first transmission band. In this study, we utilize an FDTD program to examine two phononic lenses that utilize anisotropic effects available in their second band to collimate and focus acoustic waves from a plane-wave source with a k00 wavevector. The phononic crystals consist of stainless steel rods arranged in a square lattice with water as the ambient material. Results show collimation and focusing in the second band for select frequencies, fc ± 0.005𝑓𝑐.

Paper Details

Date Published: 19 February 2014
PDF: 9 pages
Proc. SPIE 8994, Photonic and Phononic Properties of Engineered Nanostructures IV, 89940H (19 February 2014); doi: 10.1117/12.2041051
Show Author Affiliations
E. Walker, Univ. of North Texas (United States)
D. Reyes, Univ. Autónoma del Estado de México (Mexico)
M. M. Rojas, Univ. Autónoma del Estado de México (Mexico)
A. Krokhin, Univ. of North Texas (United States)
A. Neogi, Univ. of North Texas (United States)


Published in SPIE Proceedings Vol. 8994:
Photonic and Phononic Properties of Engineered Nanostructures IV
Ali Adibi; Shawn-Yu Lin; Axel Scherer, Editor(s)

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