Postdoctoral position : Characterization of locally resonant acoustic metamaterials

Laboratory: Institut d’Alembert , Université Pierre et Marie Curie, Paris

Contact : Pr. Régis Wunenburger (regis.wunenburger @

Description : Acoustic metamaterials are composite materials which are designed so that the propagation of acoustic waves exhibits remarkable properties in specific frequency ranges like band gaps or negative effective refractive index. These unique properties allow to foresee original strategies of control of the propagation of acoustic waves with potential applications to guiding, filtering, imaging, non destructive control, isolation, cloaking… In the frame of the ANR funded Metakoustik project (2012---2015), which gathers 4 research teams from CRPP (Bordeaux), I2M (Bordeaux), LoF (Bordeaux), and d’Alembert Institute (Paris), we work on the design, the synthesis by physico--- chemistry and microfluidics, and the acoustic characterization of so---called locally resonant acoustic metamaterials, i.e. whose microstructure is made of mechanical resonators: drops, bubbles, hard core---soft shells particles, with the aim of obtaining these non usual propagation properties in the ultrasonic frequency range.

Two realistic designs of metamaterials supposed to work in the ultrasonic frequency range could be indentified: a dispersion of dense spheres in a hard matrix, and more promisingly, a dispersion of dense spheres coated with a thin polymer shell [1]. These materials are presently being produced in LoF. In close collaboration with the postdoc in charge with their synthesis, the postdoc working in Institut d’Alembert will be in charge of :

  • implementing a new acoustic characterization bench in order to extract more precisely the properties of the materials composing the metamaterials (celerity and absorption of longitudinal waves, density), then of the metamaterials themselves,
  • measuring the complex shear modulus of the materials composing the metamaterials by using a transverse wave bench, with the aim of evidencing the expected unique propagation properties of the synthesized dispersions (band gap) and possibly of their combination with encapsulated bubbles (negative effective refractive index).

[1] L. Bos, L. Lukyanova, R. Wunenburger, Constraints on the design of core---shell resonators of  locally resonant acoustic metamaterials, Phys. Rev. B 86, 184107 (2012).

[2] R. Tadmouri, et al., Millifluidic production of metallic microparticles, Soft Matter 8, 10704 (2012).

Salary: net 24 400€ / year (gross 30 000€ / year) (CNRS---Solvay postdoctoral grant)

Application deadline: 21 Sep 2013

Views: 227

Tags: TINC-Job, monitor


You need to be a member of The International NanoScience Community to add comments!

Join The International NanoScience Community

Next partner events of TINC

We are Media Partner of:

Welcome - about us

Welcome! Nanopaprika was cooked up by Hungarian chemistry PhD student in 2007. The main idea was to create something more personal than the other nano networks already on the Internet. Community is open to everyone from post-doctorial researchers and professors to students everywhere.

There is only one important assumption: you have to be interested in nano!

Nanopaprika is always looking for new partners, if you have any idea, contact me at

Dr. András Paszternák, founder of Nanopaprika

Publications by A. Paszternák:

The potential use of cellophane test strips for the quick determination of food colours

pH and CO2 Sensing by Curcumin-Coloured Cellophane Test Strip

Polymeric Honeycombs Decorated by Nickel Nanoparticles

Directed Deposition of Nickel Nanoparticles Using Self-Assembled Organic Template,

Organometallic deposition of ultrasmooth nanoscale Ni film,

Zigzag-shaped nickel nanowires via organometallic template-free route

Surface analytical characterization of passive iron surface modified by alkyl-phosphonic acid layers

Atomic Force Microscopy Studies of Alkyl-Phosphonate SAMs on Mica

Amorphous iron formation due to low energy heavy ion implantation in evaporated 57Fe thin films

Surface modification of passive iron by alkylphosphonic acid layers

Formation and structure of alkylphosphonic acid layers on passive iron

Structure of the nonionic surfactant triethoxy monooctylether C8E3 adsorbed at the free water surface, as seen from surface tension measurements and Monte Carlo simulations