2024-03-28T11:34:58Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/922922016-02-18T03:04:23Zcom_10261_34com_10261_5col_10261_287
Negative refraction and backward waves in layered acoustic metamaterials
Christensen, Johan
García de Abajo, Francisco Javier
We investigate layered acoustic metamaterials capable of exhibiting a wide variety of wave propagation phenomena, including backward and forward waves with and without negative refraction. The metamaterials are formed by periodically perforated hard plates, which we describe analytically in the limit of small holes compared to both the period and the separation between plates. In particular, we derive expressions for the index of refraction and the transmission and reflection coefficients of finite slabs. We provide illustrative examples of near fields for all four combinations of backward and forward waves with and without negative refraction, along with dispersion diagrams that explain the observed behavior. A comprehensive study of the range of geometrical parameters in which these distinct phenomena are observed is presented as well. These metamaterials hold great promise for achieving full control of sound using simple structures, with potential application to acoustic technologies relying on subwavelength control and imaging of sound. © 2012 American Physical Society.
This work has been supported by the Spanish MICINN (MAT2010-14885 and Consolider NanoLight.es) and the European Commission (FP7-ICT-2009-4-248909-LIMA and FP7-ICT-2009-4-248855-N4E). J. C. gratefully acknowledges financial support from the Carlsberg Foundation under Contract No. MetaSound 2011-01-0099.
Peer Reviewed
2014-02-21T14:05:25Z
2014-02-21T14:05:25Z
2012
2014-02-21T14:05:26Z
artículo
http://purl.org/coar/resource_type/c_6501
doi: 10.1103/PhysRevB.86.024301
issn: 1098-0121
e-issn: 1550-235X
Physical Review B 86: 024301 (2012)
http://hdl.handle.net/10261/92292
10.1103/PhysRevB.86.024301
#PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/EC/FP7/248855
info:eu-repo/grantAgreement/EC/FP7/248909
http://dx.doi.org/10.1103/PhysRevB.86.024301
open
American Physical Society