Steering in-plane shear waves with inertial resonators in platonic crystals

Younes Achaoui (1) , Andre Diatta (1) , Sébastien Guenneau (2)

1 FRESNEL - Institut FRESNEL
2 EPSILON - EPSILON

Numerical simulations shed light on control of shear elastic wave propagation in plates structured with inertial resonators. The structural element is composed of a heavy core connected to the main freestanding plate through tiny ligaments. It is shown that such a configuration exhibits a complete band gap in the low frequency regime. As a byproduct, we further describe the asymmetric twisting vibration of a single scatterer via modal analysis, dispersion, and transmission loss. This might pave the way to functionalities such as focusing and self-collimation in elastic plates.

Domaines: Optique [physics.optics]

Younes Achaoui, Andre Diatta, Sébastien Guenneau. Steering in-plane shear waves with inertial resonators in platonic crystals . Applied Physics Letters, 2015, 106 (223502), pp.4. ⟨10.1063/1.4922187⟩. ⟨hal-01283633⟩