Confined acoustic line modes within a glide-symmetric waveguide

被引：2
|
作者：
Moore, Daniel B. [1 ]
Ward, Gareth P. [1 ]
Smith, John D. [2 ]
Hibbins, Alastair P. [1 ]
Sambles, J. Roy [1 ]
Starkey, Timothy A. [1 ]
机构：
[1] Univ Exeter, Dept Phys & Astron, Electromagnet & Acoust Mat Grp, Stocker Rd, Exeter EX4 4QL, Devon, England
[2] DSTL, Salisbury SP4 0JQ, Wilts, England
来源：
SCIENTIFIC REPORTS | 2022年 / 12卷 / 01期
关键词：
PROPAGATION;
D O I：
10.1038/s41598-022-13782-1
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
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.
引用
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页数：9
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