Planar ultrasonic transducer based on a metasurface piezoelectric ring array for subwavelength acoustic focusing in water
- Title
- Planar ultrasonic transducer based on a metasurface piezoelectric ring array for subwavelength acoustic focusing in water
- Author
- 윤길호
- Issue Date
- 2022-01
- Publisher
- NATURE RESEARCH
- Citation
- SCIENTIFIC REPORTS, v. 12, NO. 1, article no. 1485, Page. 1-11
- Abstract
- The development of a new ultrasonic transducer capable of improved focusing performance has become a necessity to overcome the limitations of conventional ultrasonic transducer technology. In this study, we designed and optimized a metasurface piezoelectric ring device, and using multiphysics finite element analysis, we examined the performance of a planar ultrasonic transducer consisting of this device, a matching layer, a backing layer, and housing in producing a needle-like subwavelength focusing beam in water. For practical experiments, a metasurface piezoelectric ring device was fabricated using a laser ablation process. Subsequently, using a pulse-echo test, we found that the − 6 dB bandwidth of a planar ultrasonic transducer with a center frequency of 1.0 MHz was 37.5%. In addition, the results of an ultrasonic-focusing performance test showed that the full width at half-maximum of the axial subwavelength focusing beam was 0.78λ, and the full lateral width at half-maximum of the subwavelength lateral focusing beam was 7.03λ at a distance of 10.89λ. The needle-like focused ultrasonic beam technology implemented with a piezoelectric ring array based new planar ultrasound transducer is expected to be used in high-resolution imaging devices or medical ultrasound focusing devices in the future.
- URI
- https://www.nature.com/articles/s41598-022-05547-7https://repository.hanyang.ac.kr/handle/20.500.11754/177849
- ISSN
- 2045-2322
- DOI
- 10.1038/s41598-022-05547-7
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
- Files in This Item:
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