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

作　　者：余思远 倪旭 徐叶龙 何程 Priyanka Nayar 卢明辉 陈延峰 

机构地区：[1]National Laboratory of Solid State Microstructures and Department of Materials Science and Engineering,Nanjing University

出　　处：《Chinese Physics Letters》2016年第4期64-67,共4页中国物理快报（英文版）

基　　金：Supported by the National Basic Research Program of China under Grant Nos 2012CB921503,2013CB632904 and 2013CB632702;the National Natural Science Foundation of China under Grant No 1134006;the Natural Science Foundation of Jiangsu Province under Grant No BK20140019;the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education;the China Postdoctoral Science Foundation under Grant Nos 2012M511249 and 2013T60521

摘　　要：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.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.

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分 类 号：TN25[电子电信—物理电子学]