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Author Yang, Xishan ♦ Yin, Jing ♦ Yu, Gaokun ♦ Peng, Linhui ♦ Wang, Ning
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ DESIGN ♦ FREQUENCY RANGE ♦ METAMATERIALS ♦ RESOLUTION ♦ RESONANCE ♦ RESONATORS ♦ SOUND WAVES ♦ TRANSMISSION ♦ WAVELENGTHS
Abstract Acoustic superlens provides a way to overcome the diffraction limit with respect to the wavelength of the bulk wave in air. However, the operating frequency range of subwavelength imaging is quite narrow. Here, an acoustic superlens is designed using Helmholtz-resonator-based metamaterials to broaden the bandwidth of super-resolution. An experiment is carried out to verify subwavelength imaging of double slits, the imaging of which can be well resolved in the frequency range from 570 to 650 Hz. Different from previous works based on the Fabry-Pérot resonance, the corresponding mechanism of subwavelength imaging is the Fano resonance, and the strong coupling between the neighbouring Helmholtz resonators separated at the subwavelength interval leads to the enhanced sound transmission over a relatively wide frequency range.
ISSN 00036951
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-11-09
Publisher Place United States
Journal Applied Physics Letters
Volume Number 107
Issue Number 19


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