Bowl-shaped ZnO ultrasonic transducer for photoacoustic/ultrasonic multimode microscopy | Zhang, J.
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Bowl-shaped ZnO ultrasonic transducer for photoacoustic/ultrasonic multimode microscopy

Archive ouverte : Communication dans un congrès

Zhang, J. | Zhao, D. | Li, D. | Tian, F. | Xu, Wei-Jiang | Wu, X.

Edité par HAL CCSD ; IEEE

International audience. A bowl-shaped ultrasonic transducer is proposed for photoacoustic/ultrasonic multimode microscopy. The transducer uses zinc oxide (ZnO) as the piezoelectric material, which has a better electromechanical coefficient than flexible PVDF polymer and ensures the detection sensitivity. The ZnO film is spherically curved realizing self-focusing. It does not require an acoustic lens, consequently avoiding echo interference by the lens. In addition, it can be integrated with optical fibers. The resonant modes of the bowl-shaped ZnO film were calculated using finite element method. A photoacoustic/ultrasonic dual-modality imaging system is under development to adapt to the designed photoacoustic transducer. First test and imaging are carried out using a commercial ultrasonic transducer.

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