Invisible omnidirectional lens for flexural ...
Type de document :
Article dans une revue scientifique: Article original
DOI :
Titre :
Invisible omnidirectional lens for flexural waves in thin elastic plates
Auteur(s) :
Jin, Yabin [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Torrent, Daniel [Auteur]
Centre de Recherche Paul Pascal [CRPP]
Djafari-Rouhani, Bahram [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Torrent, Daniel [Auteur]
Centre de Recherche Paul Pascal [CRPP]
Djafari-Rouhani, Bahram [Auteur]

Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Titre de la revue :
Journal of Physics D: Applied Physics
Pagination :
225301
Éditeur :
IOP Publishing
Date de publication :
2017-06-07
ISSN :
0022-3727
Mot(s)-clé(s) en anglais :
Invisible lens
Thickness variation
Flexural wave
interference
Thickness variation
Flexural wave
interference
Discipline(s) HAL :
Physique [physics]/Physique [physics]/Optique [physics.optics]
Résumé en anglais : [en]
A feasible approach is proposed in this work to realize an acoustic omnidirectional invisible lens for flexural waves in thin elastic plates. These devices require extreme values of the refractive index close to its center, ...
Lire la suite >A feasible approach is proposed in this work to realize an acoustic omnidirectional invisible lens for flexural waves in thin elastic plates. These devices require extreme values of the refractive index close to its center, and in this work this drawback is overcome by reducing gradually the thickness of the elastic plate, which has the same effect as increasing proportionally the refractive index. Although ideally the thickness of the plate should be zero at the central point, it is shown that a finite but small minimum thickness is enough to provide a good invisibility effect. Numerical simulations are performed by the finite element method, which supports the theoretical predictions, showing that an invisible lens is feasible for flexural waves.Lire moins >
Lire la suite >A feasible approach is proposed in this work to realize an acoustic omnidirectional invisible lens for flexural waves in thin elastic plates. These devices require extreme values of the refractive index close to its center, and in this work this drawback is overcome by reducing gradually the thickness of the elastic plate, which has the same effect as increasing proportionally the refractive index. Although ideally the thickness of the plate should be zero at the central point, it is shown that a finite but small minimum thickness is enough to provide a good invisibility effect. Numerical simulations are performed by the finite element method, which supports the theoretical predictions, showing that an invisible lens is feasible for flexural waves.Lire moins >
Langue :
Anglais
Comité de lecture :
Oui
Audience :
Internationale
Vulgarisation :
Non
Source :