Dual-frequency piezoelectric micromachined ultrasound transducer based on polarization switching in ferroelectric thin films
Abstract Due to its additional frequency response, dual-frequency ultrasound has advantages over conventional ultrasound, which operates at a specific frequency band. Moreover, a tunable frequency from a single transducer enables sonographers to achieve ultrasound images with a large detection area...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Publishing Group
2023-10-01
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| Series: | Microsystems & Nanoengineering |
| Online Access: | https://doi.org/10.1038/s41378-023-00595-z |
| _version_ | 1797559019190091776 |
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| author | Jin Soo Park Soo Young Jung Dong Hun Kim Jung Ho Park Ho Won Jang Tae Geun Kim Seung-Hyub Baek Byung Chul Lee |
| author_facet | Jin Soo Park Soo Young Jung Dong Hun Kim Jung Ho Park Ho Won Jang Tae Geun Kim Seung-Hyub Baek Byung Chul Lee |
| author_sort | Jin Soo Park |
| collection | DOAJ |
| description | Abstract Due to its additional frequency response, dual-frequency ultrasound has advantages over conventional ultrasound, which operates at a specific frequency band. Moreover, a tunable frequency from a single transducer enables sonographers to achieve ultrasound images with a large detection area and high resolution. This facilitates the availability of more advanced techniques that simultaneously require low- and high-frequency ultrasounds, such as harmonic imaging and image-guided therapy. In this study, we present a novel method for dual-frequency ultrasound generation from a ferroelectric piezoelectric micromachined ultrasound transducer (PMUT). Uniformly designed transducer arrays can be used for both deep low-resolution imaging and shallow high-resolution imaging. To switch the ultrasound frequency, the only requirement is to tune a DC bias to control the polarization state of the ferroelectric film. Flextensional vibration of the PMUT membrane strongly depends on the polarization state, producing low- and high-frequency ultrasounds from a single excitation frequency. This strategy for dual-frequency ultrasounds meets the requirement for either multielectrode configurations or heterodesigned elements, which are integrated into an array. Consequently, this technique significantly reduces the design complexity of transducer arrays and their associated driving circuits. |
| first_indexed | 2024-03-10T17:39:39Z |
| format | Article |
| id | doaj.art-5701bce92696497eb4c58c82da403c28 |
| institution | Directory Open Access Journal |
| issn | 2055-7434 |
| language | English |
| last_indexed | 2024-03-10T17:39:39Z |
| publishDate | 2023-10-01 |
| publisher | Nature Publishing Group |
| record_format | Article |
| series | Microsystems & Nanoengineering |
| spelling | doaj.art-5701bce92696497eb4c58c82da403c282023-11-20T09:44:39ZengNature Publishing GroupMicrosystems & Nanoengineering2055-74342023-10-019111110.1038/s41378-023-00595-zDual-frequency piezoelectric micromachined ultrasound transducer based on polarization switching in ferroelectric thin filmsJin Soo Park0Soo Young Jung1Dong Hun Kim2Jung Ho Park3Ho Won Jang4Tae Geun Kim5Seung-Hyub Baek6Byung Chul Lee7Bionics Research Center, Korea Institute of Science and TechnologyCenter for Electronic Materials, Korea Institute of Science and TechnologyBionics Research Center, Korea Institute of Science and TechnologyDepartment of Electrical Engineering, Korea UniversityDepartment of Material Science and Engineering, Seoul National UniversityDepartment of Electrical Engineering, Korea UniversityCenter for Electronic Materials, Korea Institute of Science and TechnologyBionics Research Center, Korea Institute of Science and TechnologyAbstract Due to its additional frequency response, dual-frequency ultrasound has advantages over conventional ultrasound, which operates at a specific frequency band. Moreover, a tunable frequency from a single transducer enables sonographers to achieve ultrasound images with a large detection area and high resolution. This facilitates the availability of more advanced techniques that simultaneously require low- and high-frequency ultrasounds, such as harmonic imaging and image-guided therapy. In this study, we present a novel method for dual-frequency ultrasound generation from a ferroelectric piezoelectric micromachined ultrasound transducer (PMUT). Uniformly designed transducer arrays can be used for both deep low-resolution imaging and shallow high-resolution imaging. To switch the ultrasound frequency, the only requirement is to tune a DC bias to control the polarization state of the ferroelectric film. Flextensional vibration of the PMUT membrane strongly depends on the polarization state, producing low- and high-frequency ultrasounds from a single excitation frequency. This strategy for dual-frequency ultrasounds meets the requirement for either multielectrode configurations or heterodesigned elements, which are integrated into an array. Consequently, this technique significantly reduces the design complexity of transducer arrays and their associated driving circuits.https://doi.org/10.1038/s41378-023-00595-z |
| spellingShingle | Jin Soo Park Soo Young Jung Dong Hun Kim Jung Ho Park Ho Won Jang Tae Geun Kim Seung-Hyub Baek Byung Chul Lee Dual-frequency piezoelectric micromachined ultrasound transducer based on polarization switching in ferroelectric thin films Microsystems & Nanoengineering |
| title | Dual-frequency piezoelectric micromachined ultrasound transducer based on polarization switching in ferroelectric thin films |
| title_full | Dual-frequency piezoelectric micromachined ultrasound transducer based on polarization switching in ferroelectric thin films |
| title_fullStr | Dual-frequency piezoelectric micromachined ultrasound transducer based on polarization switching in ferroelectric thin films |
| title_full_unstemmed | Dual-frequency piezoelectric micromachined ultrasound transducer based on polarization switching in ferroelectric thin films |
| title_short | Dual-frequency piezoelectric micromachined ultrasound transducer based on polarization switching in ferroelectric thin films |
| title_sort | dual frequency piezoelectric micromachined ultrasound transducer based on polarization switching in ferroelectric thin films |
| url | https://doi.org/10.1038/s41378-023-00595-z |
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