Acoustic elliptical cylindrical cloaks  

作　　者：马华 屈绍波 徐卓 王甲富 

机构地区：[1]The College of Science,Air Force University of Engineering [2]Electronic Materials Research Laboratory,Key Laboratory of Ministry of Education,Xi'an Jiaotong University

出　　处：《Chinese Physics B》2009年第3期1123-1126,共4页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos 50632030,10474077 and 60871027);the National Basic Research Program of China (Grant No 2009CB613306);The Innovation Funds of the College of Science,Air Force University of Engineering,China

摘　　要：By making a comparison between the acoustic equations and the 2-dimensional （2D） Maxwell equations, we obtain the material parameter equations （MPE） for acoustic elliptical cylindrical cloaks. Both the theoretical results and the numerical results indicate that an elliptical cylindrical cloak can realize perfect acoustic invisibility when the spatial distributions of mass density and bulk modulus are exactly configured according to the proposed equations. The present work is the meaningful exploration of designing acoustic cloaks that are neither sphere nor circular cylinder in shape, and opens up possibilities for making complex and multiplex acoustic cloaks with simple models such as spheres, circular or elliptic cylinders.By making a comparison between the acoustic equations and the 2-dimensional （2D） Maxwell equations, we obtain the material parameter equations （MPE） for acoustic elliptical cylindrical cloaks. Both the theoretical results and the numerical results indicate that an elliptical cylindrical cloak can realize perfect acoustic invisibility when the spatial distributions of mass density and bulk modulus are exactly configured according to the proposed equations. The present work is the meaningful exploration of designing acoustic cloaks that are neither sphere nor circular cylinder in shape, and opens up possibilities for making complex and multiplex acoustic cloaks with simple models such as spheres, circular or elliptic cylinders.

关 键 词：INVISIBILITY cloaks METAMATERIALS acoustic waves 

分 类 号：O441.6[理学—电磁学]