Effective birefringence to analyze sound transmission through a layer with subwavelength slits

Agnès Maurel; Simon Félix; Jean François Mercier; Abdel Ourir

doi:10.1016/j.crme.2015.07.006

Effective birefringence to analyze sound transmission through a layer with subwavelength slits

Agnès Maurel, Simon Félix, Jean François Mercier, Abdel Ourir

Research output: Contribution to journal › Short survey › peer-review

Abstract

We analyze the transmission of sound through a sound hard film or layer with periodic subwavelength slits. For wavelength comparable to or larger than the slit spacing, the transmission spectra are revisited in terms of the transmission through an equivalent birefringent layer. It is shown that the Fano-type resonances can be understood by means of the dispersion relations of guided waves within the birefringent layer in the homogenized problem, equivalent to spoof plasmons for gratings. This is done by extending the homogenization to the evanescent waves being excited in the near field of the actual perforated layer.

Original language	English
Pages (from-to)	612-621
Number of pages	10
Journal	Comptes Rendus - Mecanique
Volume	343
Issue number	12
DOIs	https://doi.org/10.1016/j.crme.2015.07.006
Publication status	Published - 1 Dec 2015

Keywords

Acoustic array
Homogenization
Metamaterial
Spoof plasmon

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10.1016/j.crme.2015.07.006

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title = "Effective birefringence to analyze sound transmission through a layer with subwavelength slits",

abstract = "We analyze the transmission of sound through a sound hard film or layer with periodic subwavelength slits. For wavelength comparable to or larger than the slit spacing, the transmission spectra are revisited in terms of the transmission through an equivalent birefringent layer. It is shown that the Fano-type resonances can be understood by means of the dispersion relations of guided waves within the birefringent layer in the homogenized problem, equivalent to spoof plasmons for gratings. This is done by extending the homogenization to the evanescent waves being excited in the near field of the actual perforated layer.",

keywords = "Acoustic array, Homogenization, Metamaterial, Spoof plasmon",

author = "Agn{\`e}s Maurel and Simon F{\'e}lix and Mercier, \{Jean Fran{\c c}ois\} and Abdel Ourir",

note = "Publisher Copyright: {\textcopyright} 2015 Acad{\'e}mie des sciences.",

year = "2015",

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doi = "10.1016/j.crme.2015.07.006",

language = "English",

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TY - JOUR

T1 - Effective birefringence to analyze sound transmission through a layer with subwavelength slits

AU - Maurel, Agnès

AU - Félix, Simon

AU - Mercier, Jean François

AU - Ourir, Abdel

PY - 2015/12/1

Y1 - 2015/12/1

N2 - We analyze the transmission of sound through a sound hard film or layer with periodic subwavelength slits. For wavelength comparable to or larger than the slit spacing, the transmission spectra are revisited in terms of the transmission through an equivalent birefringent layer. It is shown that the Fano-type resonances can be understood by means of the dispersion relations of guided waves within the birefringent layer in the homogenized problem, equivalent to spoof plasmons for gratings. This is done by extending the homogenization to the evanescent waves being excited in the near field of the actual perforated layer.

AB - We analyze the transmission of sound through a sound hard film or layer with periodic subwavelength slits. For wavelength comparable to or larger than the slit spacing, the transmission spectra are revisited in terms of the transmission through an equivalent birefringent layer. It is shown that the Fano-type resonances can be understood by means of the dispersion relations of guided waves within the birefringent layer in the homogenized problem, equivalent to spoof plasmons for gratings. This is done by extending the homogenization to the evanescent waves being excited in the near field of the actual perforated layer.

KW - Acoustic array

KW - Homogenization

KW - Metamaterial

KW - Spoof plasmon

U2 - 10.1016/j.crme.2015.07.006

DO - 10.1016/j.crme.2015.07.006

M3 - Short survey

AN - SCOPUS:84938675042

SN - 1631-0721

VL - 343

SP - 612

EP - 621

JO - Comptes Rendus - Mecanique

JF - Comptes Rendus - Mecanique

IS - 12

ER -

Effective birefringence to analyze sound transmission through a layer with subwavelength slits

Abstract

Keywords

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