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Manipulation of extraordinary acoustic transmission by a tunable bull’s eye structure
引用本文:王继伟,程营,刘晓峻.Manipulation of extraordinary acoustic transmission by a tunable bull’s eye structure[J].中国物理 B,2014(5):27-31.
作者姓名:王继伟  程营  刘晓峻
基金项目:Project supported by the National Basic Research Program of China(Grant No.2012CB921504);the National Natural Science Foundation of China(GrantNos.11104139,11274171,11274099,and 11204145);SRFDP(Grant Nos.20110091120040,20120091110001,and 20130091130004);the NaturalScience Foundation of Jiangsu Province,China(Grant No.BK2011542)
摘    要:Extraordinary acoustic transmission (EAT) has been investigated in a tunable bull's eye structure. We demonstrate that the transmission coefficient of acoustic waves can be modulated by a grating structure. When the grating is located at a distance of 0.5 mm from the base plate, the acoustic transmission shows an 8.77-fold enhancement compared to that by using a traditional bull's eye structure. When the distance increases to 1.5 mm, the transmission approaches zero, indicating a total reflection. Thus, we can make an efficient modulation of acoustic transmission from 0 to 877%. The EAT effects have been ascribed to the coupling of structure-induced resonance with the diffractive wave and the waveguide modes, as well as the Fabry-Perot resonances. As a potential application, the modulation of far-field collimation is illustrated in the proposed bull's eye structure.

关 键 词:光栅结构  波传输  可调  操作  透射系数  波导模式  EAT  调制

Manipulation of extraordinary acoustic transmission by a tunable bull's eye structure
Wang Ji-Wei,Cheng Ying,Liu Xiao-Jun.Manipulation of extraordinary acoustic transmission by a tunable bull's eye structure[J].Chinese Physics B,2014(5):27-31.
Authors:Wang Ji-Wei  Cheng Ying  Liu Xiao-Jun
Abstract:extraordinary acoustic transmission, acoustic grating, transmission modulation, sound collimation
Keywords:extraordinary acoustic transmission  acoustic grating  transmission modulation  sound collimation
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