Acoustic transmission enhancement through a periodically-structured stiff plate without any opening

Details Acoustic transmission enhancement through a periodically-structured stiff plate without any opening Acoustic transmission enhancement through a periodically-structured stiff plate without any opening

2009-12-21

arxiv.org/abs/0912.4096v2

Physics

Classical Physics

11 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.105.074301

We report both experimentally and theoretically that the enhanced acoustic transmission can occur in the subwavelength region through a thin but stiff structured-plate without any opening. This exotic acoustic phenomenon is essentially distinct from the previous related studies originated from, either collectively or individually, the interaction of the incident wave with openings in previous structures. It is attributed to the structure-induced resonant excitation of the non-leaky Lamb modes that exist intrinsically in the uniform elastic plate. Our finding should have impact on ultrasonic applications.

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