Approximation Approach of Realizing an Arbitrarily Shaped Acoustic Cloak with Homogeneous Isotropic Materials
GAO Dong-Bao, ZENG Xin-Wu**
College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073
Abstract ：An approximation approach is proposed for realizing an arbitrarily shaped acoustic cloak. Based on the effective medium theory, the designed cloak is a discrete layered structure using homogeneous isotropic materials. The performance of the cloak is simulated, and the results demonstrate that the cloak possesses properties of low-reflection outside the cloak and wavefront-bending in the cloak shell. This work proves the feasibility of realizing an arbitrarily shaped acoustic cloak using normal materials.
收稿日期: 2012-07-16
出版日期: 2012-11-28
:
43.35.Bf
(Ultrasonic velocity, dispersion, scattering, diffraction, and Attenuation in liquids, liquid crystals, suspensions, and emulsions)
43.20.El
(Reflection, refraction, diffraction of acoustic waves)
63.22.Np
(Layered systems)
[1] Cummer S A and Schurig D 2007 New J. Phys. 9 45 2007 Appl. Phys. Lett. 91 183518 2010 J. Phys. D: Appl. Phys. 43 113001 2006 Science 312 1780 2008 Proc. R. Soc. A 464 2411 2006 New J. Phys. 8 248 2000 Science 289 1734 2006 Nat. Mater. 5 452 2008 New J. Phys. 10 023004 2011 Phys. Rev. Lett. 106 024301 2008 New J. Phys. 10 063015 2008 Appl. Phys. Lett. 92 151913 2008 Chin. Phys. Lett. 25 3696 2010 Chin. Phys. Lett. 27 034102 2012 Chin. Phys. Lett. 29 014102 2009 Chin. Phys. Lett. 26 014301 Acta Phys. Sin. 61 184301 (in Chinese)1983 J. Acoust. Soc. Am. 73 61
2012, Vol. 29 
