The 2019 Surface Acoustic Waves Roadmap

Delsing, Per, Cleland, Andrew N., Schuetz, M. J. A., Knörzer, J., Giedke, G., Cirac, J. I., Srinivasan, Kartik, Wu, Marcelo, Balram, Krishna Coimbatore, Bäuerle, Christopher, Meunier, Tristan, Ford, Christopher J. B., Santos, Paulo V., Cerda-Méndez, Edgar, Wang, Hailin, Krenner, Hubert J., Nysten, Emeline D. S., Weiß, Matthias, Nash, G. R., Thevenard, L., Gourdon, C., Rovillain, P., Marangolo, M., Duquesne, J.-Y., Fischerauer, Gerhard, Reiner, Alexander, Paschke, Ben, Denysenko, Dmytro, Volkmer, Dirk, Wixforth, Achim, Bruus, Henrik, Wiklund, Martin, Reboud, Julien, Cooper, Jonathan M., Fu, Yong Qing, Brugger, Manuel S., Rehfeldt, Florian and Westerhausen, Christoph (2019) The 2019 Surface Acoustic Waves Roadmap. Journal of Physics D: Applied Physics, 52 (35). p. 353001. ISSN 0022-3727

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Abstract

Today, Surface Acoustic Waves (SAWs) and Bulk Acoustic Waves (BAW) are already two of the very few phononic technologies of industrial relevance and can been found in a myriad of devices employing these nanoscale earthquakes on a chip. Acoustic radio frequency filters, for instance, are integral parts of wireless devices. SAWs in particular find applications in life sciences and microfluidics for sensing and mixing of tiny amounts of liquids. In addition to these continuously growing number of applications, SAWs are ideally suited to probe and control elementary excitations in condensed matter at the limit of single quantum excitations. Even collective excitations, classical or quantum, or integrated optomechanical are nowadays coherently interfaced by SAWs.

This wide, highly diverse, interdisciplinary and continuously expanding spectrum literally unites advanced sensing and manipulation applications. Remarkably, SAW technology is inherently multiscale and span from single atomic or nanoscopic units up even to the millimeter scale.

The aim of this roadmap article is to present a snapshot of the present state of Surface Acoustic Wave science and technology in 2019 and provide an opinion on the challenges and opportunities that the future holds from a group of renown experts covering the interdisciplinary key areas, ranging from fundamental quantum effects to practical applications of acoustic devices in life science.

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