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Porous metamaterials for deep sub-wavelength ultrasonic imaging
Published in American Institute of Physics Inc.
2018
Volume: 113
   
Issue: 12
Abstract
This paper reports the application of a porous medium as an aperiodic metamaterial lens for ultrasonic imaging in the context of nondestructive evaluation and non-invasive diagnostics. Experimental results are presented, demonstrating a deep sub-wavelength imaging down to 1/36th of the operating wavelength, which is the highest resolution demonstrated worldwide using bulk ultrasound. The improvement in the resolution is shown to be linked to aperiodicity overcoming the Wood anomaly, which sets limits on wave transmission by holey structured lenses. © 2018 Author(s).
About the journal
JournalData powered by TypesetApplied Physics Letters
PublisherData powered by TypesetAmerican Institute of Physics Inc.
ISSN00036951
Open AccessNo
Concepts (15)
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    Imaging systems
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    Metamaterials
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    Nondestructive examination
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    Porous materials
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    Ultrasonic imaging
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    Wave transmission
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    APERIODICITY
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    HIGHEST RESOLUTIONS
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    METAMATERIAL LENS
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    NON DESTRUCTIVE EVALUATION
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    NON-INVASIVE DIAGNOSTICS
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    Operating wavelength
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    Porous medium
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    Sub-wavelength
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    Ultrasonic testing