中国物理B ›› 2016, Vol. 25 ›› Issue (10): 104302-104302.doi: 10.1088/1674-1056/25/10/104302

所属专题： Virtual Special Topic — Acoustics

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Acoustic focusing through two layer annuluses in air

Yi-Jun Guan(管义钧), Hong-Xiang Sun(孙宏祥), Shu-Sen Liu(刘树森), Shou-Qi Yuan(袁寿其), Jian-Ping Xia(夏建平), Yong Ge(葛勇)   

  1. 1 Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China;
    2 State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China
  • 收稿日期:2016-04-03 修回日期:2016-05-15 出版日期:2016-10-05 发布日期:2016-10-05
  • 通讯作者: Hong-Xiang Sun, Shou-Qi Yuan E-mail:jsdxshx@ujs.edu.cn;Shouqiy@ujs.edu.cn
  • 基金资助:
    Project supported by the Major Program of the National Natural Science Foundation of China (Grant No. 51239005), the National Natural Science Foundation of China (Grant No. 11404147), the Natural Science Foundation of Jiangsu Province, China (Grant No. BK20140519), the China Postdoctoral Science Foundation (Grant No. 2015M571672), the Research Fund for Advanced Talents of Jiangsu University, China (Grant No. 11JDG118), and the Training Project of Young Backbone Teachers of Jiangsu University, China.

Acoustic focusing through two layer annuluses in air

Yi-Jun Guan(管义钧)1, Hong-Xiang Sun(孙宏祥)1,2, Shu-Sen Liu(刘树森)1, Shou-Qi Yuan(袁寿其)1, Jian-Ping Xia(夏建平)1, Yong Ge(葛勇)1   

  1. 1 Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China;
    2 State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2016-04-03 Revised:2016-05-15 Online:2016-10-05 Published:2016-10-05
  • Contact: Hong-Xiang Sun, Shou-Qi Yuan E-mail:jsdxshx@ujs.edu.cn;Shouqiy@ujs.edu.cn
  • Supported by:
    Project supported by the Major Program of the National Natural Science Foundation of China (Grant No. 51239005), the National Natural Science Foundation of China (Grant No. 11404147), the Natural Science Foundation of Jiangsu Province, China (Grant No. BK20140519), the China Postdoctoral Science Foundation (Grant No. 2015M571672), the Research Fund for Advanced Talents of Jiangsu University, China (Grant No. 11JDG118), and the Training Project of Young Backbone Teachers of Jiangsu University, China.

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摘要： We report an acoustic focusing lens composed of two-layer annuluses made of metal cylinders in air. We find that the cylindrical waves can be focused into a perfect point without diffraction in the centre of the annuluses, which arises from the Mie-resonance modes in the annuluses. The focusing frequencies are related to the size of the inner annulus, and the focusing effect can be applied to the annuluses with different shapes and incident positions. Interesting applications of the focusing lens in the acoustic beam splitter and directional transmitter with energy enhancement are further discussed.

关键词: acoustic focusing, metamaterials, annulus, cylinder

Abstract: We report an acoustic focusing lens composed of two-layer annuluses made of metal cylinders in air. We find that the cylindrical waves can be focused into a perfect point without diffraction in the centre of the annuluses, which arises from the Mie-resonance modes in the annuluses. The focusing frequencies are related to the size of the inner annulus, and the focusing effect can be applied to the annuluses with different shapes and incident positions. Interesting applications of the focusing lens in the acoustic beam splitter and directional transmitter with energy enhancement are further discussed.

Key words: acoustic focusing, metamaterials, annulus, cylinder

中图分类号:  (Ultrasonics, quantum acoustics, and physical effects of sound)

  • 43.35.+d
43.20.+g (General linear acoustics)