中国物理B ›› 2014, Vol. 23 ›› Issue (5): 54301-054301.doi: 10.1088/1674-1056/23/5/054301

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Manipulation of extraordinary acoustic transmission by a tunable bull’s eye structure

王继伟a, 程营a b, 刘晓峻a b   

  1. a Key Laboratory of Modern Acoustics, Nanjing University, Nanjing 210093, China;
    b State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China
  • 收稿日期:2013-11-01 修回日期:2013-12-02 出版日期:2014-05-15 发布日期:2014-05-15
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant No. 2012CB921504), the National Natural Science Foundation of China (Grant Nos. 11104139, 11274171, 11274099, and 11204145), SRFDP (Grant Nos. 20110091120040, 20120091110001, and 20130091130004), and the Natural Science Foundation of Jiangsu Province, China (Grant No. BK2011542).

Manipulation of extraordinary acoustic transmission by a tunable bull’s eye structure

Wang Ji-Wei (王继伟)a, Cheng Ying (程营)a b, Liu Xiao-Jun (刘晓峻)a b   

  1. a Key Laboratory of Modern Acoustics, Nanjing University, Nanjing 210093, China;
    b State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2013-11-01 Revised:2013-12-02 Online:2014-05-15 Published:2014-05-15
  • Contact: Cheng Ying, Liu Xiao-Jun E-mail:chengying@nju.edu.cn;liuxiaojun@nju.edu.cn
  • About author:43.20.Fn; 43.20.El; 43.20.Ks; 43.35.-c
  • Supported by:
    Project supported by the National Basic Research Program of China (Grant No. 2012CB921504), the National Natural Science Foundation of China (Grant Nos. 11104139, 11274171, 11274099, and 11204145), SRFDP (Grant Nos. 20110091120040, 20120091110001, and 20130091130004), and the Natural Science 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: extraordinary acoustic transmission, acoustic grating, transmission modulation, sound collimation

Abstract: 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.

Key words: extraordinary acoustic transmission, acoustic grating, transmission modulation, sound collimation

中图分类号:  (Scattering of acoustic waves)

  • 43.20.Fn
43.20.El (Reflection, refraction, diffraction of acoustic waves) 43.20.Ks (Standing waves, resonance, normal modes) 43.35.-c (Ultrasonics, quantum acoustics, and physical effects of sound)