| Manipulation of extraordinary acoustic transmission by a tunable bull’s eye structure |
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| 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, 0(5): 27-31 |
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| 作者姓名： | 王继伟 程营 刘晓峻 |
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| 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) |
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| 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.
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| 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 |
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| 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, 0(5): 27-31 |
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| Authors: | Wang Ji-Wei Cheng Ying Liu Xiao-Jun |
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| Abstract: | extraordinary acoustic transmission, acoustic grating, transmission modulation, sound collimation |
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| Keywords: | extraordinary acoustic transmission acoustic grating transmission modulation sound collimation |
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