Design of acoustic beam aperture modifier using gradient-index phononic crystals

Author

Lin, Sz-Chin S. ; Tittmann, Bernhard R. ; Huang, Tony J.

Author_Institution

Dept. of Eng. Sci. & Mech., Pennsylvania State Univ., University Park, PA, USA

fYear

2010

fDate

11-14 Oct. 2010

Firstpage

1474

Lastpage

1477

Abstract

This paper reports the design of a novel acoustic beam aperture modifier using gradient-index phononic crystals consisting of different solid cylinders embedded in a homogeneous epoxy background. Dispersion curves of the acoustic waves were calculated using a plane-wave expansion (PWE) method and their propagation in the proposed structure was simulated by a finite-element time-domain (FDTD) method. Computational experiments elucidate the effectiveness of the acoustic beam aperture modifier.

Keywords

II-VI semiconductors; acoustic dispersion; acoustic wave propagation; acoustic waves; acousto-optical devices; acousto-optical effects; brass; cadmium; cast iron; chromium; finite element analysis; gradient index optics; molybdenum; niobium; phononic crystals; refractive index; resins; time-domain analysis; titanium compounds; wide band gap semiconductors; zinc; zinc compounds; Cd-Cd; Cr-ZnO; Mo-TiC; Nb-Cr; TiC-Nb; Zn-ZnO; ZnO-ZnO; acoustic beam aperture modifier; acoustic waves; acoustooptical effects; dispersion curves; finite-element time-domain method; gradient-index phononic crystals; homogeneous epoxy background; plane-wave expansion method; refractive index; solid cylinders; Acoustic beams; Acoustic waves; Apertures; Finite difference methods; Materials; Time domain analysis; beam aperture modifier; gradient-index; phononic crystals;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium (IUS), 2010 IEEE

Conference_Location

San Diego, CA

ISSN

1948-5719

Print_ISBN

978-1-4577-0382-9

Type

conf

DOI

10.1109/ULTSYM.2010.5935876

Filename

5935876