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 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.

中文翻译：

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通过差动激励抑制 SAW 产生的电磁串扰

表面声波 (SAW) 在自旋电子学、量子声学和电子量子光学等各个领域具有巨大的潜力，但 SAW 生成电路发出的电磁波往往是一个主要障碍。在这里，我们研究了叉指换能器的差分激励方法，以在减少电磁波的同时产生 SAW。结果表明，各个方向的电磁波均被抑制90%以上。这种抑制克服了操作限制并提高了 SAW 系统的可扩展性。我们的研究结果有望促进广泛研究领域中基于 SAW 的应用的开发。