Experimental evidence of amplitude-dependent surface wave dispersion via nonlinear contact resonances

Setare Hajarolasvadi, Paolo Celli, Brian Kim, Ahmed E. Elbanna, Chiara Daraio

Research output: Contribution to journalArticlepeer-review


In this Letter, we provide an experimental demonstration of amplitude-dependent dispersion tuning of surface acoustic waves interacting with nonlinear resonators. Leveraging the similarity between the dispersion properties of plate edge waves and surface waves propagating in a semi-infinite medium, we use a setup consisting of a plate with a periodic arrangement of bead-magnet resonators along one of its edges. Nonlinear contact between the ferromagnetic beads and magnets is exploited to realize nonlinear local resonance effects. First, we experimentally demonstrate the nonlinear softening nature and amplitude-dependent dynamics of a single bead-magnet resonator on both rigid and compliant substrates. Next, the dispersion properties of the system in the linear regime are investigated. Finally, we demonstrate how the interplay of nonlinear local resonances with plate edge waves gives rise to amplitude-dependent dispersion properties. The findings will inform the design of more versatile surface acoustic wave devices that can passively adapt to loading conditions.

Original languageEnglish (US)
Article number081704
JournalApplied Physics Letters
Issue number8
StatePublished - Aug 21 2023
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


Dive into the research topics of 'Experimental evidence of amplitude-dependent surface wave dispersion via nonlinear contact resonances'. Together they form a unique fingerprint.

Cite this