Acoustic Tamm states in slender tubes
Document type :
Communication dans un congrès avec actes
Title :
Acoustic Tamm states in slender tubes
Author(s) :
Khattou, S. []
Amrani, M. [Auteur]
Mouadili, A. [Auteur]
El Boudouti, E.H. [Auteur]
Djafari-Rouhani, Bahram [Auteur]
Physique - IEMN [PHYSIQUE - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Amrani, M. [Auteur]
Mouadili, A. [Auteur]
El Boudouti, E.H. [Auteur]
Djafari-Rouhani, Bahram [Auteur]
Physique - IEMN [PHYSIQUE - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Scientific editor(s) :
Hammouti B.Eddaoudi M.Touzani R.
Conference title :
4th International Conference on Materials and Environmental Science, ICMES 2020
City :
Oujda
Country :
Maroc
Start date of the conference :
2020-11-18
Publisher :
Elsevier Ltd
Publication date :
2021
English keyword(s) :
Acoustic Tamm states
Band gap
Comb-like structure
Surface modes
Transmission
Band gap
Comb-like structure
Surface modes
Transmission
HAL domain(s) :
Sciences de l'ingénieur [physics]
English abstract : [en]
We present an analytical and numerical study of the possibility of existence of surface localized modes, the so-called Tamm states, in a one-dimensional (1D) comb-like phononic crystal (PnC). The structure is made out of ...
Show more >We present an analytical and numerical study of the possibility of existence of surface localized modes, the so-called Tamm states, in a one-dimensional (1D) comb-like phononic crystal (PnC). The structure is made out of periodic array of stubs of lengths d2grafted along a waveguide and separated from each other by a tube of length d1. We show the existence of surface modes for the semi-infinite structure. In particular, when one considers two complementary semi-infinite systems obtained by cutting the infinite one into two parts, we obtain one surface mode per gap induced by the surface of the two complementary systems. Furthermore, we demonstrate that these surface modes can be detected from the maxima and minima of the transmission spectrum, when the finite structure is grafted vertically along a homogeneous acoustic waveguide. That means that one can observe experimentally this type of modes for acoustic waves in slender tubes. These results may find many practical applications in noise control and highly sensitive PnC sensors. © 2021 Elsevier Ltd. All rights reserved.Show less >
Show more >We present an analytical and numerical study of the possibility of existence of surface localized modes, the so-called Tamm states, in a one-dimensional (1D) comb-like phononic crystal (PnC). The structure is made out of periodic array of stubs of lengths d2grafted along a waveguide and separated from each other by a tube of length d1. We show the existence of surface modes for the semi-infinite structure. In particular, when one considers two complementary semi-infinite systems obtained by cutting the infinite one into two parts, we obtain one surface mode per gap induced by the surface of the two complementary systems. Furthermore, we demonstrate that these surface modes can be detected from the maxima and minima of the transmission spectrum, when the finite structure is grafted vertically along a homogeneous acoustic waveguide. That means that one can observe experimentally this type of modes for acoustic waves in slender tubes. These results may find many practical applications in noise control and highly sensitive PnC sensors. © 2021 Elsevier Ltd. All rights reserved.Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Internationale
Popular science :
Non
Source :