Surface acoustic waves (SAWs) hold a vast potential in various fields such as spintronics, quantum acoustics, and electron-quantum optics, but an electromagnetic wave emanating from SAW generation circuits has often been a major hurdle. Here, we investigate a differential excitation method of interdigital transducers (IDTs) to generate SAWs while reducing the electromagnetic wave. The results show that electromagnetic waves are suppressed by more than 90% in all directions. This suppression overcomes the operating limits and improves the scalability of SAW systems. Our results promise to facilitate the development of SAW-based applications in a wide range of research fields.
@article{arxiv.2312.15413,
title = {Suppression of Electromagnetic Crosstalk by Differential Excitation for SAW Generation},
author = {Shunsuke Ota and Yuma Okazaki and Shuji Nakamura and Takehiko Oe and Hermann Sellier and Christopher Bäuerle and Nobu-Hisa Kaneko and Tetsuo Kodera and Shintaro Takada},
journal= {arXiv preprint arXiv:2312.15413},
year = {2025}
}