Far-field acoustic subwavelength imaging and edge detection based on spatial filtering and wave vector conversion
The resolution of acoustic imaging suffers from diffraction limit due to the loss of evanescent field that carries subwavelength information. Most of the current methods for overcoming the diffraction limit in acoustics still operate in the near-field of the object. Here we demonstrate the design an...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Article |
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Nature Publishing Group
2019
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| Online Access: | http://hdl.handle.net/1721.1/121078 https://orcid.org/0000-0001-7944-7646 https://orcid.org/0000-0001-5713-629X |
| _version_ | 1811076001416871936 |
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| author | Ma, Chu Kim, Seok Fang, Xuanlai |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering Ma, Chu Kim, Seok Fang, Xuanlai |
| author_sort | Ma, Chu |
| collection | MIT |
| description | The resolution of acoustic imaging suffers from diffraction limit due to the loss of evanescent field that carries subwavelength information. Most of the current methods for overcoming the diffraction limit in acoustics still operate in the near-field of the object. Here we demonstrate the design and experimental realization of an acoustic far-field subwavelength imaging system. Our system is based on wave vector filtering and conversion with a transmitter at the near-field and a spatially symmetrical receiver at the far-field. By tuning geometric parameters of the transmitting/receiving pair, different spatial frequency bands can be separated and projected to the far-field. Furthermore, far-field imaging and edge detection of subwavelength objects are experimentally demonstrated. The proposed system brings new possibilities for far-field subwavelength wave manipulation, which can be further applied to medical imaging, nondestructive testing, and acoustic communication. |
| first_indexed | 2024-09-23T10:14:35Z |
| format | Article |
| id | mit-1721.1/121078 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T10:14:35Z |
| publishDate | 2019 |
| publisher | Nature Publishing Group |
| record_format | dspace |
| spelling | mit-1721.1/1210782022-09-26T16:40:32Z Far-field acoustic subwavelength imaging and edge detection based on spatial filtering and wave vector conversion Ma, Chu Kim, Seok Fang, Xuanlai Massachusetts Institute of Technology. Department of Mechanical Engineering Ma, Chu Kim, Seok Fang, Xuanlai The resolution of acoustic imaging suffers from diffraction limit due to the loss of evanescent field that carries subwavelength information. Most of the current methods for overcoming the diffraction limit in acoustics still operate in the near-field of the object. Here we demonstrate the design and experimental realization of an acoustic far-field subwavelength imaging system. Our system is based on wave vector filtering and conversion with a transmitter at the near-field and a spatially symmetrical receiver at the far-field. By tuning geometric parameters of the transmitting/receiving pair, different spatial frequency bands can be separated and projected to the far-field. Furthermore, far-field imaging and edge detection of subwavelength objects are experimentally demonstrated. The proposed system brings new possibilities for far-field subwavelength wave manipulation, which can be further applied to medical imaging, nondestructive testing, and acoustic communication. United States. Office of Naval Research. Multidisciplinary University Research Initiative (Grant No. N00014-13-1-0631) 2019-03-25T15:52:38Z 2019-03-25T15:52:38Z 2019-01 2019-03-04T13:40:23Z Article http://purl.org/eprint/type/JournalArticle 2041-1723 http://hdl.handle.net/1721.1/121078 Ma, Chu, Seok Kim, and Nicholas X. Fang. “Far-Field Acoustic Subwavelength Imaging and Edge Detection Based on Spatial Filtering and Wave Vector Conversion.” Nature Communications 10, no. 1 (January 14, 2019). https://orcid.org/0000-0001-7944-7646 https://orcid.org/0000-0001-5713-629X http://dx.doi.org/10.1038/s41467-018-08221-7 Nature Communications Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ application/pdf Nature Publishing Group Nature |
| spellingShingle | Ma, Chu Kim, Seok Fang, Xuanlai Far-field acoustic subwavelength imaging and edge detection based on spatial filtering and wave vector conversion |
| title | Far-field acoustic subwavelength imaging and edge detection based on spatial filtering and wave vector conversion |
| title_full | Far-field acoustic subwavelength imaging and edge detection based on spatial filtering and wave vector conversion |
| title_fullStr | Far-field acoustic subwavelength imaging and edge detection based on spatial filtering and wave vector conversion |
| title_full_unstemmed | Far-field acoustic subwavelength imaging and edge detection based on spatial filtering and wave vector conversion |
| title_short | Far-field acoustic subwavelength imaging and edge detection based on spatial filtering and wave vector conversion |
| title_sort | far field acoustic subwavelength imaging and edge detection based on spatial filtering and wave vector conversion |
| url | http://hdl.handle.net/1721.1/121078 https://orcid.org/0000-0001-7944-7646 https://orcid.org/0000-0001-5713-629X |
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