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Article Dans Une Revue Applied Physics Letters Année : 2016

Focusing of Rayleigh waves with gradient-index phononic crystals

Résumé

We report on the subwavelength focusing of Rayleigh waves using gradient-index (GRIN) phononic crystals (PCs) made of air holes scatters in a thick silicon substrate. The subwavelength focusing is demonstrated both in the inner and in the silicon substrate behind the GRIN PCs by using a non-contact experimental technique. In both situations, the focal zone was observed at the position, which is in very good agreement with our theoretical predictions, at a frequency in the sound cone free of radiation into the substrate.
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Dates et versions

hal-01414717 , version 1 (15-12-2016)

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Jinfeng Zhao, Bernard Bonello, Loic Becerra, Olga Boyko, Rémi Marchal. Focusing of Rayleigh waves with gradient-index phononic crystals. Applied Physics Letters, 2016, 108, pp.221905 - 53504. ⟨10.1063/1.4953168⟩. ⟨hal-01414717⟩
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