Research on Single-Phase Unidirectional Transducers Based Acoustic Delay Lines and Modulators

Speaker:  Yang Li

Time:      13:00, Jan. 17

Location: SIST 3-201

Host:      Tao Wu 

Abstract:

The demand for high-performance micro-nano devices has driven interest in SPUDTs for acoustic delay lines (ADLs) and multiphysics devices. This study explores SPUDT applications in wide bandwidth and tunability. A frequency band analysis method evaluates S21 and bandwidth, revealing relationships between passband, loss, unit count, and piezoelectric properties. Dual-SPUDT ADLs improve fractional bandwidth by 65.8% with minimal insertion loss. In AlN-based acousto-optic modulators, optimized SPUDT structures achieve high coupling efficiency. Thermal-controlled SPUDTs enable frequency tuning up to 16 MHz with 0.2 MHz/mW efficiency. This work combines theory, simulation, and experiments, advancing multifunctional micro-nano devices.

Bio:

Yang Li received the B.S. degree in electrical engineering from Qingdao University, Qingdao, China, in 2022. He is currently pursuing the M.S. degree with ShanghaiTech University, Shanghai, China. His research interests include the design and micro-fabrication techniques of piezoelectric radio frequency micro-electromechanical system (RF MEMS) and hybrid micro-systems based on the integration of MEMS device. Mr. Li received National Scholarship from Ministry of Education of China in 2024. In addition, he was honored the Professor Wen Ko's Best Paper Award Second Prize from the 11th Asia-Pacific Conference of Transducers and Micro-Nano Technology (APCOT 2024)