Ultra-broadband asymmetric acoustic transmission with single transmitted beam  

作　　者：Ding Jia Hong-xiang Sun Shou-qa Yuan Yong Ge 贾鼎;孙宏祥;袁寿其;葛勇(Research Center of Fluid Machinery Engineering and Technology,Faculty of Science,Jiangsu University;State Key Laboratory of Acoustics,Institute of Acoustics,Chinese Academy of Sciences)

机构地区：[1]Research Center of Fluid Machinery Engineering and Technology, Faculty of Science, Jiangsu University, Zhenjiang 212013, China [2]State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China

出　　处：《Chinese Physics B》2017年第2期288-293,共6页中国物理B（英文版）

基　　金：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 of China(Grant No.BK20140519);China Postdoctoral Science Foundation(Grant No.2015M571672);the Scientific Research Project for Graduate Students of Universities in Jiangsu Province,China(Grant No.CXZZ13 06);the Training Project of Young Backbone Teachers of Jiangsu University

摘　　要：We report both experimentally and numerically that ultra-broadband asymmetric acoustic transmission is realized by a brass plate and a right triangle reflector immersed in water. This exotic phenomenon arises from the asymmetric excitation of the leaky asymmetric zero-order Lamb mode in the brass plate induced by the incident angle of external bulk waves. The results show that the bandwidth of the asymmetric acoustic transmission could reach 2000 k Hz, and the positive transmitted wave is only a single acoustic beam. The device has the advantages of ultra-broadband, single transmitted beam,and simpler structure, which has great potential applications in ultrasonic devices.We report both experimentally and numerically that ultra-broadband asymmetric acoustic transmission is realized by a brass plate and a right triangle reflector immersed in water. This exotic phenomenon arises from the asymmetric excitation of the leaky asymmetric zero-order Lamb mode in the brass plate induced by the incident angle of external bulk waves. The results show that the bandwidth of the asymmetric acoustic transmission could reach 2000 k Hz, and the positive transmitted wave is only a single acoustic beam. The device has the advantages of ultra-broadband, single transmitted beam,and simpler structure, which has great potential applications in ultrasonic devices.

关 键 词：asymmetric acoustic transmission acoustic wave plate Lamb mode 

分 类 号：O422[理学—声学]