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Anisotropic metamaterials for full control of acoustic waves

Johan Christensen Javier Garcia de Abajo *
* Corresponding author
Abstract : We show that a holey anisotropic metamaterial can exert subwavelength control over sound waves beyond that achieved with naturally occurring materials [Nature Physics 3, 851 (2007)]. We predict that, for appropriate choices of geometrical parameters, these metamaterials support negative refraction, backward wave propagation along a direction opposite with respect to the acoustic energy flow, and subwavelength imaging [Nature Physics 7, 52 (2011)] with both the source and the image situated far from the material. Acoustic subwavelength control can be advantageous for (bio-)medical ultrasonography and diagnostic imaging, acoustouflidic steering of microparticles and microorganisms, and sonochemistry enhanced by sound focusing.
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Submitted on : Monday, April 23, 2012 - 10:00:00 AM
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Johan Christensen, Javier Garcia de Abajo. Anisotropic metamaterials for full control of acoustic waves. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00810624⟩

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