I will provide an overview on recent researches on acoustic and elastic metamaterials and metasurfaces for controllable wave manipulation, we are developing in my group in the University of Lorraine. I first will present some advances related to low-frequency acoustic and vibration shielding/absorption making use of metamaterials1,2 and metasurfaces3,4, and describe the added value that such artificial engineered materials can bring to consider some innovative applications. Findings on both acoustic and elastic waves will be presented. Second, I will introduce and delineate some concepts of wave manipulation based on meta-structures and discuss their associated configurations, designs and the expected functionalities. Applications such as energy harvesting5,6 and acoustic holography7 will be presented. The purpose of this seminar is to highlight the new properties/functionalities and applications metamaterials and metasurfaces in general are enabling, and the emerging pragmatic applications they are producing.
Badreddine Assouar received his PhD degree in Materials Physics from Nancy University in France in 2001. In 2002, he became a Research Scientist at the “Centre National de la Recherche Scientifique (CNRS)” in France. He obtained his habilitation to supervise research (HDR) in 2007 and became a Research Professor. In 2010, he joined Georgia Institute of Technology in USA as visiting Professor, where he spent 2 years. Since 2012, he leads the “Acoustics Metamaterials and Phononics” group at the University of Lorraine, where he is developing researches on acoustic/elastic metamaterials, metasurfaces and phononics. B. Assouar is Associate Editor of Phys. Rev. Applied and “JASA”. He is also an expert scientist with the National Science Foundation (NSF-USA) and European Commission. He is author or co-author of more than 100 international peer reviewed publications. His research interests are in the areas of acoustic and elastic metamaterials, metasurfaces, phononics and wave physics.