Author:
Moore Daniel B.,Ward Gareth P.,Smith John D.,Hibbins Alastair P.,Sambles J. Roy,Starkey Timothy A.
Abstract
AbstractConfined 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.
Funder
Defence Science and Technology Laboratory
Publisher
Springer Science and Business Media LLC
Cited by
3 articles.
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