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Article Dans Une Revue AIP Advances Année : 2016

Guidance of surface elastic waves along a linear chain of pillars

Résumé

The propagation of surface elastic waves, or surface phonons, is considered along a linear and periodic chain of cylindrical pillars sitting on a semi-infinite solid substrate. A variety of guided modes, some of them exhibiting a very low group velocity, are shown to exist at frequencies close to the resonance frequencies of the pillars. Although the pillar diameter is typically smaller than half the relevant wavelength, lateral radiation on the surface is found to be canceled. Surface guidance is explained by the hybridization of the resonating pillars with the continuum of elastic waves of the substrate.

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hal-02131415 , version 1 (16-05-2019)

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Mohammed Abdulridha Lethawe, Mahmoud Addouche, Sarah Gaiffe, Vincent Laude, Abdelkrim Khelif. Guidance of surface elastic waves along a linear chain of pillars. AIP Advances, 2016, 6 (12), pp.121708. ⟨10.1063/1.4972552⟩. ⟨hal-02131415⟩
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