Perfect Brewster transmission through ultrathin perforated films

We address the perfect transmission of a plane acoustic wave at oblique incidence on a perforated, sound penetrable or rigid, film in two-dimensions. It is shown that the Brewster incidence θ∗ realizing so-called extraordinary transmission due to matched impedances varies significantly when the thic...

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Bibliographic Details
Published in:Wave motion 2020-03, Vol.93, p.102485, Article 102485
Main Authors: Pham, K., Maurel, A., Mercier, J.-F., Félix, S., Cordero, M.L., Horvath, C.
Format: Article
Language:English
Subjects:
Acoustic waves
Acoustics
Brewster angle
Electrical engineering
Engineering Sciences
Film thickness
Material properties
Micro and nanotechnologies
Microelectronics
Propagation
Sound waves
Thick films
Thin films
Wavelengths
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Summary:We address the perfect transmission of a plane acoustic wave at oblique incidence on a perforated, sound penetrable or rigid, film in two-dimensions. It is shown that the Brewster incidence θ∗ realizing so-called extraordinary transmission due to matched impedances varies significantly when the thickness e of the film decreases. For thick films, i.e.ke≫1 with k the incident wavenumber, the classical effective medium model provides an accurate prediction of the Brewster angle independent of e (this Brewster angle is denoted θB). However, for thinner films with ke
ISSN:0165-2125
1878-433X
DOI:10.1016/j.wavemoti.2019.102485