Invisible omnidirectional lens for flexural ...
Document type :
Article dans une revue scientifique: Article original
DOI :
Title :
Invisible omnidirectional lens for flexural waves in thin elastic plates
Author(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]
Journal title :
Journal of Physics D: Applied Physics
Pages :
225301
Publisher :
IOP Publishing
Publication date :
2017-06-07
ISSN :
0022-3727
English keyword(s) :
Invisible lens
Thickness variation
Flexural wave
interference
Thickness variation
Flexural wave
interference
HAL domain(s) :
Physique [physics]/Physique [physics]/Optique [physics.optics]
English abstract : [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, ...
Show more >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.Show less >
Show more >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.Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Internationale
Popular science :
Non
Source :