Quasi-two-dimensional acoustic metamaterial with negative bulk modulus
| Autor: | José Sánchez-Dehesa, Victor M. García-Chocano, Rogelio Graciá-Salgado, Francisco Cervera, Daniel Torrent |
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| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Bulk modulus
Materials science Condensed matter physics ESTADISTICA E INVESTIGACION OPERATIVA Physics::Optics Metamaterial Radius Condensed Matter Physics Electronic Optical and Magnetic Materials Characterization (materials science) TECNOLOGIA ELECTRONICA Dispersion relation FISICA APLICADA Slab Waveguide (acoustics) Realization (systems) |
| Zdroj: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia instname |
| Popis: | We present the experimental realization and characterization of an acoustic metamaterial with negative bulk modulus. The metamaterial consists of a two-dimensional array of cylindrical cavities, and the bulk modulus is controlled by their radius size and length. Experiments are performed in a two-dimensional waveguide where a slab of seven layers is used to extract the parameters of the metamaterial. A complete characterization of the constructed structure is reported, including the dispersion relation of the acoustic bands and the skin depth effect, which both have been measured, and the data are well supported by semianalytical models and by finite-element simulations. © 2012 American Physical Society. This work was supported by the Spanish MICINN under Contracts No. TEC2010-19751 and No. CSD2008-0066 (CONSOLIDER program), and by the USA Office of Naval Research. We acknowledge the technical help by A. Diaz-Rubio and A. Climente. J.S.-D. acknowledges useful discussions with A. Broatch and A. Krokhin. D.T. acknowledges the postdoctoral grant provided by the UPV under the program Campus de excelencia internacional. |
| Databáze: | OpenAIRE |
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