Experimental observation of resonant ...
Document type :
Compte-rendu et recension critique d'ouvrage
Title :
Experimental observation of resonant filtering in a two-dimensional phononic crystal waveguide
Author(s) :
Vasseur, Jérôme [Auteur]
Acoustique - IEMN [ACOUSTIQUE - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Vasseur, Jerôme [Auteur]
Laboratoire de dynamique et structure des matériaux moléculaires [LDSMM]
Deymier, Pierre [Auteur]
Beaugeois, Maxime [Auteur]
Pennec, Yan [Auteur]
Laboratoire Louis Néel [LLN]
Djafari-Rouhani, Bahram [Auteur]
Laboratoire de dynamique et structure des matériaux moléculaires [LDSMM]
Prevost, Dominique [Auteur]
Acoustique - IEMN [ACOUSTIQUE - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Vasseur, Jerôme [Auteur]
Laboratoire de dynamique et structure des matériaux moléculaires [LDSMM]
Deymier, Pierre [Auteur]
Beaugeois, Maxime [Auteur]
Pennec, Yan [Auteur]
Laboratoire Louis Néel [LLN]
Djafari-Rouhani, Bahram [Auteur]
Laboratoire de dynamique et structure des matériaux moléculaires [LDSMM]
Prevost, Dominique [Auteur]
Journal title :
Zeitschrift für Kristallographie - Crystalline Materials
Pages :
829-835
Publisher :
De Gruyter
Publication date :
2005-10-01
ISSN :
2194-4946
HAL domain(s) :
Sciences de l'ingénieur [physics]
Physique [physics]
Physique [physics]
English abstract : [en]
Abstract Transmission of acoustic waves through a two-dimensional composite material made of PVC cylinders surrounded by air is measured experimentally. The spectrum presents a very large absolute band gap in the audible ...
Show more >Abstract Transmission of acoustic waves through a two-dimensional composite material made of PVC cylinders surrounded by air is measured experimentally. The spectrum presents a very large absolute band gap in the audible frequency range. A waveguide created inside this phononic crystal by removing a row of cylinders can transmit very efficiently the waves falling inside the stop band. We show the existence of deaf modes in the band structure of the linear waveguide. Resonant filtering is also demonstrated experimentally by coupling the waveguide to a side branch resonator of variable length. Frequency filtering is observed in the form of narrow dips in the transmission spectrum of the waveguide. Most of these observations compare favorably with theoretical calculations of dispersion curves and transmission coefficients of model structures using the plane wave expansion and the finite difference time domain methods. Narrow dips similar to those of the guide with resonator are also observed in the transmission spectrum of a waveguide with a sharp bend.Show less >
Show more >Abstract Transmission of acoustic waves through a two-dimensional composite material made of PVC cylinders surrounded by air is measured experimentally. The spectrum presents a very large absolute band gap in the audible frequency range. A waveguide created inside this phononic crystal by removing a row of cylinders can transmit very efficiently the waves falling inside the stop band. We show the existence of deaf modes in the band structure of the linear waveguide. Resonant filtering is also demonstrated experimentally by coupling the waveguide to a side branch resonator of variable length. Frequency filtering is observed in the form of narrow dips in the transmission spectrum of the waveguide. Most of these observations compare favorably with theoretical calculations of dispersion curves and transmission coefficients of model structures using the plane wave expansion and the finite difference time domain methods. Narrow dips similar to those of the guide with resonator are also observed in the transmission spectrum of a waveguide with a sharp bend.Show less >
Language :
Anglais
Popular science :
Non
Source :