Amireddy, Kiran Kumar ; Balasubramanian, Krishnan ; Rajagopal, Prabhu (2018) Porous metamaterials for deep sub-wavelength ultrasonic imaging Applied Physics Letters, 113 (12). ISSN 0003-6951
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Official URL: https://doi.org/10.1063/1.5045087
Related URL: http://dx.doi.org/10.1063/1.5045087
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.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Institute of Physics Publishing. |
| ID Code: | 141015 |
| Deposited On: | 24 Nov 2025 06:02 |
| Last Modified: | 24 Nov 2025 06:02 |
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