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Phys. Rev. Lett. 88, 023902 (2001) [4 pages]

Refractive Acoustic Devices for Airborne Sound

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F. Cervera, L. Sanchis, J. V. Sánchez-Pérez, R. Martínez-Sala, C. Rubio, and F. Meseguer*
Centro Tecnológico de Ondas, Unidad Asociada de Investigación (CSIC-UPV), Edificio de Institutos II, Universidad Politécnica de Valencia, E-46022 Valencia, Spain

C. López
Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas, Cantoblanco, E-28049 Madrid, Spain

D. Caballero and J. Sánchez-Dehesa†
Departamento de Física Teórica de la Materia Condensada, Facultad de Ciencias (C-5), Universidad Autónoma de Madrid, E-28049 Madrid, Spain

Received 8 May 2001; published 27 December 2001

We show that a sonic crystal made of periodic distributions of rigid cylinders in air acts as a new material which allows the construction of refractive acoustic devices for airborne sound. It is demonstrated that, in the long-wave regime, the crystal has low impedance and the sound is transmitted at subsonic velocities. Here, the fabrication and characterization of a convergent lens are presented. Also, an example of a Fabry-Perot interferometer based on this crystal is analyzed. It is concluded that refractive devices based on sonic crystals behave in a manner similar to that of optical systems.

© 2002 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.88.023902
DOI:
10.1103/PhysRevLett.88.023902
PACS:
43.20.+g, 43.58.+z, 43.90.+v

*Author to whom correspondence should be addressed. Electronic mails: fmese@fis.upv.es; jose.sanchezdehesa@uam.es

†Author to whom correspondence should be addressed. Electronic mails: fmese@fis.upv.es; jose.sanchezdehesa@uam.es

 
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