Localized surface plate modes via flexural Mie resonances

M. Farhat (1) , P.-Y. Chen (2) , Sebastien Guenneau (3, 4) , K. N. Salama (5) , H. Bağci (5)

1 QEERI - Qatar Environment and Energy Research Institute
2 Wayne State University [Detroit]
3 FRESNEL - Institut FRESNEL
4 EPSILON - EPSILON
5 KAUST - King Abdullah University of Science and Technology [Saudi Arabia]

Surface-plasmon polaritons are naturally generated upon excitation of metals with high-frequency electromagnetic waves. However, the concept of spoof plasmons has made it possible to generate plasmoniclike effects in microwave electrodynamics, magnetics, and even acoustics. Similarly, in this paper, the concept of localized surface plate modes (SPMs) is introduced. It is demonstrated that SPMs can be generated on a two-dimensional (clamped or stress-free) cylindrical surface with subwavelength corrugations, which resides on a thin elastic plate, under excitation by an incident flexural plane wave. Numerical characterization of this corrugated rigid structure shows that it is elastically equivalent to a cylindrical scatterer with dispersive but uniformly negative flexural rigidity. This, indeed, suggests that plasmoniclike elastic materials can be engineered with potential applications in various areas including earthquake sensing and elastic imaging and cloaking.

Domaines: Acoustique [physics.class-ph]; Mécanique des solides [physics.class-ph]; Optique / photonique

M. Farhat, P.-Y. Chen, Sebastien Guenneau, K. N. Salama, H. Bağci. Localized surface plate modes via flexural Mie resonances. Physical Review B, 2017, 95 (17), pp.174201. ⟨10.1103/PhysRevB.95.174201⟩. ⟨hal-01637659⟩