Double-negative acoustic metamaterials based on quasi-two-dimensional fluid-like shells

Autor:	José Sánchez-Dehesa, Rogelio Graciá-Salgado, Daniel Torrent
Rok vydání:	2012
Předmět:	Physics Range (particle radiation) Bulk modulus Scattering Acoustics ESTADISTICA E INVESTIGACION OPERATIVA Building unit Shell (structure) General Physics and Astronomy TECNOLOGIA ELECTRONICA Acoustic metamaterials Cylinder Waveguide (acoustics)
Zdroj:	RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia instname
ISSN:	1367-2630
DOI:	10.1088/1367-2630/14/10/103052
Popis:	A structured cylindrical scatterer with low-frequency resonances in both the effective bulk modulus and the dynamical mass density is designed and characterized. The proposed scattering unit is made of a rigid cylinder surrounded by a fluid-like shell embedded in a two-dimensional waveguide of height less than the length of the cylindrical scatterer. It is demonstrated that the acoustic metamaterials based on this building unit have negative acoustic parameters in a broad range of frequencies. It is also shown that double-negative behavior can be tailored by adjusting the dimensions and properties of the materials forming the structured scattering unit. This work was partially supported by the Spanish Ministerio de Ciencia e Innovacion (MICINN) under contracts TEC2010-19751 and CSD2008-66 (the CONSOLIDER program) and by the US Office of Naval Research. The authors acknowledge Victor M Garcia-Chocano for useful discussions and Kimee Moore for proofreading the paper.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::44fff5aaa608609aa907fe16b807ec2f https://doi.org/10.1088/1367-2630/14/10/103052 Zobrazit plný text záznamu