Confined acoustic line modes within a glide-symmetric waveguide.
Sci Rep
; 12(1): 10954, 2022 Jun 29.
Article
em En
| MEDLINE
| ID: mdl-35768477
ABSTRACT
Confined coupled acoustic line-modes supported by two parallel lines of periodic holes on opposite surfaces of a glide-symmetric waveguide have a hybrid character combining symmetric and anti-symmetric properties. These hybrid coupled acoustic line-modes have a near constant group velocity over a broad frequency range as no band gap is formed at the first Brillouin zone boundary. We show that the hybrid character of these confined modes is tuneable as a function of the spacing between the two surfaces. Further we explore how the band-gap reappears as the glide symmetry is broken.
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MEDLINE
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En
Ano de publicação:
2022
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Article