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.
Domaines
Acoustique [physics.class-ph]
Fichier principal
_pdf_archive_APPLAB_vol_108_iss_22_221905_1_am.pdf (1.26 Mo)
Télécharger le fichier
Origine | Fichiers éditeurs autorisés sur une archive ouverte |
---|