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Applied Physics Letters / Volume 96 / Issue 26 / DEVICE PHYSICS

Appl. Phys. Lett. 96, 263502 (2010); http://dx.doi.org/10.1063/1.3457447 (3 pages)

Acoustic far-field focusing effect for two-dimensional graded negative refractive-index sonic crystals

Shasha Peng, Zhaojian He, Han Jia, Anqi Zhang, Chunyin Qiu, Manzhu Ke, and Zhengyou Liu

Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, People's Republic of China

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(Received 2 April 2010; accepted 3 June 2010; published online 28 June 2010)

Focusing effect is experimentally observed for acoustic plane wave normally incident onto a two-dimensional sonic crystal with gradient negative refractive index. The gradual refractive-index is achieved by gradual modification of the lattice spacing both along the transverse and longitudinal directions. It is found that the focal length is controllable by modulation of the lattice spacing. The experiment results are in excellent agreement with theoretical calculation by a multiple scattering theory method.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

acoustic focusing, refractive index

PACS

  • 43.20.-f

    General linear acoustics

  • 78.20.Ci

    Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity)

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3457447

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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