Silicon pillars as resonators in an ...
Document type :
Communication dans un congrès avec actes
DOI :
Title :
Silicon pillars as resonators in an acoustical metamaterial
Author(s) :
Bonello, B. [Auteur]
Marchal, R. [Auteur]
Moiseyenko, R. [Auteur]
Pennec (Admin), Yan [Auteur]
Physique - IEMN [PHYSIQUE - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Djafari-Rouhani, Bahram [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Physique - IEMN [PHYSIQUE - IEMN]
Zhao, J. [Auteur]
Boyko, O. [Auteur]
Marchal, R. [Auteur]
Moiseyenko, R. [Auteur]
Pennec (Admin), Yan [Auteur]

Physique - IEMN [PHYSIQUE - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Djafari-Rouhani, Bahram [Auteur]

Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Physique - IEMN [PHYSIQUE - IEMN]
Zhao, J. [Auteur]
Boyko, O. [Auteur]
Conference title :
ASME 2014 International Mechanical Engineering Congress and Exposition, IMECE 2014
City :
Montreal
Country :
Canada
Start date of the conference :
2014-11-14
Publisher :
American Society of Mechanical Engineers (ASME)
Publication date :
2014
English keyword(s) :
Plates (structural components)
Silicon
Surface waves
Ultrasonic applications
Ultrasonic testing
Ultrasonic waves
Wave propagation
Compressional
Compressional mode
Frequency ranges
Laser ultrasonic techniques
Negative mass density
Negative modulus
Normal displacement
Silicon pillar
Resonators
Silicon
Surface waves
Ultrasonic applications
Ultrasonic testing
Ultrasonic waves
Wave propagation
Compressional
Compressional mode
Frequency ranges
Laser ultrasonic techniques
Negative mass density
Negative modulus
Normal displacement
Silicon pillar
Resonators
HAL domain(s) :
Physique [physics]
English abstract : [en]
We have investigated the propagation of Lamb waves in structures made of either an isolated resonant pillar or a set of pillars arranged in a line on a thin plate. The resonators as well as the plate are made of silicon. ...
Show more >We have investigated the propagation of Lamb waves in structures made of either an isolated resonant pillar or a set of pillars arranged in a line on a thin plate. The resonators as well as the plate are made of silicon. FEM computations show that two bending modes and one compressional mode are unambiguously identified in the frequency range of interest (0-10 MHz). We used a laser ultrasonic technique to map both the amplitude and the phase of the normal displacements on top of the pillars and at the surface of the sample. When the frequency is tuned to a resonant mode, either compressional or bending, the pillars vibrate 180° out-of-phase with respect to the Lamb waves, resulting in a negative modulus or negative mass density respectively.Show less >
Show more >We have investigated the propagation of Lamb waves in structures made of either an isolated resonant pillar or a set of pillars arranged in a line on a thin plate. The resonators as well as the plate are made of silicon. FEM computations show that two bending modes and one compressional mode are unambiguously identified in the frequency range of interest (0-10 MHz). We used a laser ultrasonic technique to map both the amplitude and the phase of the normal displacements on top of the pillars and at the surface of the sample. When the frequency is tuned to a resonant mode, either compressional or bending, the pillars vibrate 180° out-of-phase with respect to the Lamb waves, resulting in a negative modulus or negative mass density respectively.Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Internationale
Popular science :
Non
Source :