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Janus Piezoelectric Composite Design for High-Performance Ultrasonic Transducers and Imaging Applications
Chenxue Hou1,2, Qibo Lin3, Zimeng Shang1
1Shaanxi Provincial Key Laboratory of Integrated Circuit and System Integration, Faculty of Integrated Circuit, Xidian University, Xi'an 710071, China.
Abstract:
Inspired by the Roman "two-faced god" Janus, a heterogeneous ultrasonic transducer is proposed with double-sided 1-3 piezoelectric composites, exhibiting bidirectional acoustic radiation and matching. The transducer features a "dense-monolithic-sparse" distribution, optimizing acoustic impedance matching and enhancing electroacoustic energy conversion efficiency in the thickness direction. Finite element simulations confirm its superior vibration mode performance. The Janus transducer maintains a high electromechanical coupling coefficient and wide bandwidth while achieving an improved echo voltage amplitude (∼3.35 V). Furthermore, it enables high-quality photoacoustic imaging through fabricated transducers, validating its exceptional performance. The proposed heterogeneous composite design offers an effective approach for high-performance ultrasonic transducers and their application in underwater ultrasonic imaging and photoacoustic imaging.
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