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Portail > Offres > Offre UMR7198-MOHASS-001 - Métamatériaux acoustiques et élastiques supportant les modes BIC (H/F)

Bound states In the Continuum in Acoustic and Elastic Metamaterials (H/F)

This offer is available in the following languages:
Français - Anglais

Date Limite Candidature : vendredi 24 février 2023

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General information

Reference : UMR7198-MOHASS-001
Nombre de Postes : 1
Workplace : NANCY
Date of publication : Thursday, January 19, 2023
Type of Contract : FTC Scientist
Contract Period : 24 months
Expected date of employment : 1 April 2023
Proportion of work : Full time
Remuneration : 2.833,40€ gross salary/month adjustable according to the level of experience
Desired level of education : PhD
Experience required : Indifferent

Missions

We are seeking for a brilliant researcher to start a research project on Acoustic and elastic metamaterials supporting Bound state In the Continuum (BIC) propagation. Our group in the Institut Jean Lamour (IJL), Institution belonging to the University of Lorraine and CNRS, develops since many years different research topics related to acoustic/elastic metamaterials and metasurfaces, both on theoretical and experimental aspects. This has led to some majors achievements in the field of metamaterials [1-4]. In the context of the proposed project, we would like to tackle on broadband acoustic and elastic absorption using BIC.
References :
1. M. B. Assouar, B. Liang, Y. Wu, Y. Li, J-C. Cheng & Y. Jing. Nature Reviews Materials 3, (2018) 460.
2. Y. Li & M. B. Assouar. Appl. Phys. Lett., 108 (2016) 063502.
3. Y. Zhu & M. B. Assouar. Phys. Rev. B, 99 (2019) 174109.
4. S. Qi, Y. Li & M. B. Assouar. Phys. Rev. Applied, 7 (2017) 054006.

Activities

Regarding the project, we propose to theoretically develop and experimentally demonstrate the concept of broadband vibro-acoustic absorption using the exceptional properties of BIC. We, indeed, would like to develop a transformative approach by which we can implement a multifunctional feature into a thin metastructure capable to simultaneously deal with acoustic and elastic waves. To achieve this goal, computational and theoretical platforms will be established in the first part of the project as a first foundation. This will include the development of finite elements methods, as well as inverse design strategies based on deep-learning and Neural Networks approaches. The latter will then bring the project to the experimental track including the conception/design, fabrication and experimental analysis of the BIC metamaterials.

Skills

To lead this project with its different aspects, we are seeking for a brilliant candidate who has a strong background in at least two of the following fields: physical acoustics, wave physics, applied physics, applied mechanics, acoustics, … He/she should have very good English writing and communication skills. Some fundamentals in computing using deep-learning approaches and inverse design would be a plus.

Work Context

The Institut Jean Lamour (IJL) is a joint research unit (UMR 7198) of CNRS and Université de Lorraine. Focused on materials and processes science and engineering, it covers: materials, physics, acoustics, plasmas, nanomaterials and electronics. It regroups 183 researchers/lecturers, 91 engineers/technicians/administrative staff, 150 doctoral students and 25 post-doctoral fellows.
Partnerships exist with 150 companies and our research groups collaborate with more than 30 countries
throughout the world. Its exceptional instrumental platforms are spread over 4 sites; the main one is located on Artem campus in Nancy.
The project will be carried out within the “Metametarials and Phononics” group whose subjects range from acoustic/elastic metamaterials and Phononics to topological and non-Hermitian metamaterials.

Constraints and risks

*

Additional Information

PhD degree in one of these specialties: acoustics, applied physics, material physics, wave physics, mechanical engineering …

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