Extraordinary Acoustic Transmission in a Helmholtz Resonance Cavity-Constructed Acoustic Grating

We investigate both experimentally and numerically a complex structure, where ＇face-to-face＇ Helmholtz resonance cavities （HRCs） are introduced to construct a one-dimensional acoustic grating. In this system, pairs of HRCs can intensely couple with each other in two forms： a bonding state and an ant...

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Bibliographic Details
Published inChinese physics letters Vol. 33; no. 4; pp. 64 - 67
Main Author 余思远 倪旭 徐叶龙 何程 卢明辉 陈延峰
Format Journal Article
LanguageEnglish
Published 01.04.2016
Subjects
亥姆霍兹
共振模式
声学
声透射
数值模拟
结合状态
腔结构
谐振
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ISSN0256-307X
1741-3540
DOI10.1088/0256-307X/33/4/044302

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Summary:We investigate both experimentally and numerically a complex structure, where ＇face-to-face＇ Helmholtz resonance cavities （HRCs） are introduced to construct a one-dimensional acoustic grating. In this system, pairs of HRCs can intensely couple with each other in two forms： a bonding state and an anti-bonding state, analogous to the character of hydrogen molecule with two atoms due to the interference of wave functions of sound among the acoustic local-resonating structures. The bonding state is a ＇bright＇ state that interferes with the Fabry-Pbrot resonance mode, thereby causing this state to break up into two modes as the splitting of the extraordinary acoustic transmission peak. On the contrary, the anti-bonding state is a ＇dark＇ state in which the resonance mode remains entirely localized within the HRCs, and has no contribution to the acoustic transmission.
Bibliography:11-1959/O4
Si-Yuan Yu, Xu Ni, Ye-Long Xu, Cheng He, Priyanka Nayar, Ming-Hui Lu， Yan-Feng Chen National Laboratory of Solid State Microstructures and Department of Materials Science and Engineering Nanjing University, Nanjing 210093
We investigate both experimentally and numerically a complex structure, where ＇face-to-face＇ Helmholtz resonance cavities （HRCs） are introduced to construct a one-dimensional acoustic grating. In this system, pairs of HRCs can intensely couple with each other in two forms： a bonding state and an anti-bonding state, analogous to the character of hydrogen molecule with two atoms due to the interference of wave functions of sound among the acoustic local-resonating structures. The bonding state is a ＇bright＇ state that interferes with the Fabry-Pbrot resonance mode, thereby causing this state to break up into two modes as the splitting of the extraordinary acoustic transmission peak. On the contrary, the anti-bonding state is a ＇dark＇ state in which the resonance mode remains entirely localized within the HRCs, and has no contribution to the acoustic transmission.
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/33/4/044302