Léonard Dobrzynski is Emeritus Research Professor at CNRS, Lille University, France. His research interests focus on interface science, phononics, magnonics, and resonance.Abdellatif Akjouj is Professor at the University of Lille in France. His scientific activities deal with theory and modelling of wave propagation and elementary excitations in nanostructured materials, more particularly: nanoplasmonics, photonics, magnonics, phononics and optomechanics.El Houssaine El Boudouti is Professor in the Department of Physics at Université Mohammed Premier, Oujda, Morocco. His research interest concerns elementary excitations in composite materials such as phononic, photonic, electronic, and magnonic crystals.Dr. Gaëtan Lévêque is a Professor at the National Center for Scientific Research, Lille University 1, Villeneuve d'Ascq, France.Housni Al-Wahsh is Professor of Theoretical Physics and Head of the Engineering, Mathematics, and Physics Department, Faculty of Engineering, Benha University, Cairo, Egypt. He is primarily interested in the physical properties of electronic, plasmonic and magnonic crystals.Dr. Yan Pennec is a Professor at the National Center for Scientific Research, Lille University 1, Villeneuve d'Ascq, France.Abdelkrim Talbi is a Professor at the University of Lille in France. His research focuses on MEMS and NEMS, metamaterials, and microfluidics.Dr. Bahram Djafari-Rouhani is a Professor at the National Center for Scientific Research, Lille University 1, Villeneuve d'Ascq, France.