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Surface acoustic waves (SAWs) hold a vast potential in various fields such asspintronics, quantum acoustics, and electron-quantum optics, but anelectromagnetic wave emanating from SAW generation circuits has often been amajor hurdle. Here, we investigate a differential excitation method ofinterdigital transducers (IDTs) to generate SAWs while reducing theelectromagnetic wave. The results show that electromagnetic waves aresuppressed by more than 90% in all directions. This suppression overcomes theoperating limits and improves the scalability of SAW systems. Our resultspromise to facilitate the development of SAW-based applications in a wide rangeof research fields.

Suppression of Electromagnetic Crosstalk by Differential Excitation for SAW Generation