title: Acoustic Poisson-like effect in periodic structures.
abstract: Redirection of acoustic energy by 90° is shown to be possible in an otherwise acoustically transparent sonic crystal. An unresponsive "deaf" antisymmetric mode is excited by matching Bragg scattering with a quadrupole scatterer resonance. The dynamic effect causes normal unidirectional wave motion to strongly couple to perpendicular motion, analogous to the quasi-static Poisson effect in solids. The Poisson-like effect is demonstrated using the first flexural resonance in cylindrical shells of elastic solids. Simulations for a finite array of acrylic shells that are impedance and index matched to water show dramatic acoustic energy redirection in an otherwise acoustically transparent medium.
authors.affiliation: Mechanical and Aerospace Engineering, Rutgers University, Piscataway, New Jersey 08854, USA.
authors.forename: Alexey S
authors.initials: AS
authors.lastname: Titovich
authors.affiliation: Mechanical and Aerospace Engineering, Rutgers University, Piscataway, New Jersey 08854, USA.
authors.forename: Andrew N
authors.initials: AN
authors.lastname: Norris