Super-resolution imaging by resonant tunneling in anisotropic acoustic metamaterials

Aiping Liu, Xiaoming Zhou*, Guoliang Huang, Gengkai Hu

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

56 引用 (Scopus)

摘要

The resonant tunneling effects that could result in complete transmission of evanescent waves are examined in acoustic metamaterials of anisotropic effective mass. The tunneling conditions are first derived for the metamaterials composed of classical mass-in-mass structures. It is found that the tunneling transmission occurs when the total length of metamaterials is an integral number of half-wavelengths of the periodic Bloch wave. Due to the local resonance of building units of metamaterials, the Bloch waves are spatially modulated within the periodic structures, leading to the resonant tunneling occurring in the low-frequency region. The metamaterial slab lens with anisotropic effective mass is designed by which the physics of resonant tunneling and the features for evanescent field manipulations are examined. The designed lens interacts with evanescent waves in the way of the propagating wavenumber weakly dependent on the spatial frequency of evanescent waves. Full-wave simulations validate the imaging performance of the proposed lens with the spatial resolution beyond the diffraction limit.

源语言英语
页(从-至)2800-2806
页数7
期刊Journal of the Acoustical Society of America
132
4
DOI
出版状态已出版 - 10月 2012
已对外发布

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