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Plenary talks
Davide Bigoni on "Shearing, folding, and vibrating solids and structures" Abstract: During the process of folding, curvature localizes in space and progressively forms sharp edges, separated by almost undeformed elements. Origami is created by inducing folding in thin films, which can be made from paper or other materials. Differently from the creation of origami, folding in nature is a spontaneous process. Modelling of spontaneous folding is addressed in structures and solids. Similarly, during the emergence of deformation bands, strain localizes, to create stress channelling and wave trapping. A new homogenization scheme shows that a metamaterial can be designed to exhibit shear banding, followed by restabilization and final ellipticity loss. Biography: Davide Bigoni graduated from the University of Bologna (Italy), where he completed his Ph.D. in 1991 under the supervision of Professor T. Hueckel (Duke University, USA). He began his academic career as an Assistant Professor at the University of Bologna and, in 1999, became an Associate Professor at the University of Trento (Italy). Since 2001, Professor Bigoni has held a Full Professor position at the University of Trento, where he leads a dynamic research group specializing in Solid and Structural Mechanics. His recognitions include being elected a Euromech Fellow by the European Mechanics Society in 2009, receiving the Ceramic Technology Transfer Day Award in 2012, and being awarded a Doctor Honoris Causa by Ovidius University of Constanta in 2014. Additionally, he has been honored with the Panetti and Ferrari Award for Applied Mechanics by the Accademia delle Scienze di Torino. His contributions extend globally: he was the Guest Lecturer for the Midwest Mechanics Seminars in 2018, elected a Fellow of the Istituto Lombardo, Accademia di Scienze e Lettere in 2019, and featured in a 60th Anniversary Issue of the Journal of the Mechanics and Physics of Solids. In 2024, he was inducted as a Fellow of the Italian Academy of Engineering. Professor Bigoni’s research is prominently featured on the covers of nine international journals. He has played a key role in fostering academia-industry collaboration, coordinating three European grants and a Marie Curie Fellowship. He is the recipient of two prestigious ERC Advanced Grants from the European Research Council (2013, 2021). More details can be found at https://bigoni.dicam.unitn.it/
------------------------------------------------------------------------------------------------------------------------------------------------------------------ Cheng-Wei Qiu on "When heat transfer meets metamaterials and topological physics"
Abstract: The well-known three modes of heat transfer, including conduction, convection, and radiation, pave the way of flexibly controlling thermal distributions by varied implementations, thus further contributing to the emerging thermal time-varying metamaterials. In this talk, we will introduce new developments of hybrid thermal materials with artificial meta-structures to realize extremely high effective thermal conduction. We will also introduce our more recent breakthrough in topological thermal materials by constructing an orthogonal convective space with two pairs of counter-motion convections for encircling exceptional points (EPs). Configurable phase transitions were subsequently demonstrated by adjusting the EP quantities in the orthogonal convective space. Further, we report the realization of Weyl exceptional ring in thermal diffusion by using two pairs of spatiotemporal advections to obtain three imitated dimensions. The spatiotemporal thermal coupling can give rise to diffusive Fizeau drag, which features different speeds of temperature field propagation in opposite directions. We further tailor the modulated Hermiticity in both space and time, and establish an advective paradigm by periodically stacked fluid surfaces. Topological edge and conventional bulk states, as well as interface states and topological manipulations, are revealed in thermal diffusion for the first time. Those works pave the foundation of the area of topological thermal metamaterials. Biography: Prof. Cheng-Wei Qiu is Provost’s Chair Professor in National University of Singapore, NUS. He is Fellow of Academy of Engineering, Singapore. He is Foreign Fellow of Chinese Optical Society, Fellow of APS, Optica, SPIE and The Electromagnetics Academy, US. He was the recipient of President’s Science Award 2023, the highest science accolade in Singapore. He was elected Fellow of ASEAN Academy of Engineering and Technology. He is well known for his research in structured light and interfaces. He has published over 580 peer-reviewed journal papers. He was the recipient of URSI Young Scientist Award in 2008, NUS Young Investigator Award in 2011, MIT TR35@Singapore Award in 2012, Young Scientist Award by Singapore National Academy of Science in 2013, Faculty Young Research Award in NUS 2013, SPIE Rising Researcher Award 2018, Young Engineering Research Award 2018, and Engineering Researcher Award 2021 in NUS, and World Scientific Medal 2021 by Institute of Physics, Singapore, Achievement in Asia Award (Robert T. Poe Prize) by International Organization of Chinese Physicists and Astronomers in 2022. He was Highly Cited Researchers in 2019-2024 by Web of Science. He has been serving in Associate Editor for various journals such as JOSA B, PhotoniX, Photonics Research, and Editor-in-Chief for eLight (IF: 31.2). He also serves in Editorial Advisory Board for Laser and Photonics Review, Advanced Optical Materials, and ACS Photonics.
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Martin Wegener on "Nonlocality as a design tool in wave-tape and diffusion-type metamaterials” Abstract: We review our theoretical and experimental work on using nonlocal interactions in metamaterials as a design tool to engineer targeted dynamic and static behavior in wave-type systems as well as in diffusion-type systems. For example, nonlocality allows to achieve large characteristic lengths connected with anomalous size effects in elasticity beyond Cauchy elasticity. Designed nonlocal interactions can also lead to any wanted nonlocal diffusivity (or conductivity) in, e.g., static and dynamic charge flow, fluid flow, and the flow of thermal energy (thermal conduction). Biography: After completing his Diplom and PhD in physics at Johann Wolfgang Goethe-Universität Frankfurt (Germany) in 1986 and 1987, respectively, he spent two years as a postdoc at AT&T Bell Laboratories in Holmdel (U.S.A.). From 1990-1995 he was professor (C3) at Universität Dortmund (Germany), since 1995 he is professor (C4, later W3) at Institute of Applied Physics of Karlsruhe Institute of Technology (KIT). Since 2001 he has a joint appointment as department head at Institute of Nanotechnology (INT) of KIT, from 2016-2022 he was one of three directors at INT. From 2001-2014 he was the coordinator of the DFG-Center for Functional Nanostructures (CFN) at KIT. Since 2018 he is spokesperson of the Cluster of Excellence 3D Matter Made to Order. His research interests comprise ultrafast optics, (extreme) nonlinear optics, optical laser lithography, photonic crystals, optical, mechanical, electronic, and thermodynamic metamaterials, as well as transformation physics. This research has led to various awards and honors, among which are the Alfried Krupp von Bohlen und Halbach Research Award 1993, the Baden-Württemberg Teaching Award 1998, the DFG Gottfried Wilhelm Leibniz Award 2000, the European Union René Descartes Prize 2005, the Baden-Württemberg Research Award 2005, the Carl Zeiss Research Award 2006, the Hector Research Award 2008, the SPIE Prism Award 2014 for the start-up company Nanoscribe GmbH, the Stifterverband Science Award – Erwin-Schrödinger Prize 2016, and the Technology Transfer Prize of the German Physical Society (DPG) 2018. In 2014, 2015, 2016, 2017, 2018, 2020, and 2021 Clarivate Analytics listed him as “Highly Cited Researcher” (top 1%). He is Member of Leopoldina, the German Academy of Sciences (since 2006), Member of acatech, the National Academy of Science and Engineering (since 2019), Member of the Hector Fellow Academy (since 2013, President from 2016-2022), Fellow of the Max Planck School of Photonics (since 2019), Fellow of the Optical Society of America (since 2008), and Honorary Professor at Huazhong University of Science & Technology, Wuhan, China (since 2014). ------------------------------------------------------------------------------------------------------------------------------- Michael I. Weinstein on "Quantum tunneling and its complete suppression in strongly magnetic systems" Abstract: In the absence of a magnetic field, a quantum particle always tunnels from one well into a neighboring well through a “classically forbidden” region at a rate which is the reciprocal of the “eigenvalue splitting”. Magnetic systems give rise to entirely new tunneling phenomena. We construct a family of double well potentials containing examples for which quantum tunneling is completely eliminated. On the other hand, magnetic tunneling does occur for **typical** double-well potentials, and we prove an upper bound on its tunneling rate. This is joint work with C.L. Fefferman and J. Shapiro. Biography: Michael Weinstein is on the faculty at Columbia University as a Professor of Applied Mathematics in the Department of Applied Physics and Applied Mathematics, and a Professor of Mathematics in the Department of Mathematics. He received his Ph.D. from the Courant Institute at New York University in 1982 under the direction of George C. Papanicolaou, and was a postdoctoral fellow at Stanford University (1982–1984) with Joseph B. Keller. From 1984 to 1988, he was Assistant Professor of Mathematics at Princeton University. In 1988, he joined the mathematics faculty at the University of Michigan-Ann Arbor as an Associate Professor (1988–1992), and then Full Professor (1992–2000). Weinstein was a Member of Technical Staff at Bell Laboratories / Lucent Technologies in the Fundamental Mathematics Research Group from 1998–2004. In 2004, he joined the faculty of Columbia University. Weinstein is a SIAM Fellow (Society of Industrial and Applied Mathematics) and a Fellow of the American Mathematical Society. He was awarded the Martin Kruskal Prize by SIAM (2018) for his contributions to fundamental and applied aspects of nonlinear waves and coherent structures. He has been a Simons Foundation Math + X Investigator since 2015. In 2025, Weinstein was elected to the American Academy of Arts and Sciences.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Ying Wu on "Effective medium theories and their applications in metamaterials" Biography: Ying Wu is Professor and Chair of Applied Mathematics and Computational Science (AMCS) at King Abdullah University of Science and Technology (KAUST). Her research focuses on the theoretical and numerical modeling of metamaterials, with expertise spanning homogenization, coupled-mode theory, perturbation methods, and multiple
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