Jia-Ling Lin, Ya-Han Liu, Chien-Lun Kao, Shao-Wei Wu, Han-Jen Hsu, Hsiao-Chi Lin, Chih-Ying Li, Chun-Yuan Chen, Yeong-Her Wang, Chih-Hsien Huang. "Air-coupled piezoelectric micromachined ultrasonic transducer array based on low-cost and large remnant polarization PZT thin film." Scientific Reports, 2025. doi:10.1038/s41598-025-22077-0