9:30-9:45  Opening

9:45-10:15  METRAMAT Introduction
Varvara Kouznetsova, Eindhoven University of Technology

10:15-11:00  Elastic Metamaterials
Richard Craster, Imperial College London, UK

11:30-12:15  Design aspects and industrial challenges of vibroacoustic metamaterial solutions 
Luca Sangiuliano, Phononic Vibes, It

12:15-13:00  Modulating mechanical performance in additive manufacturing through surface post-processing and geometric heterogeneity  
Sara Bagherifard, PoliTecnico di Milano, It

13:00-14:15  Lunch

14:15-15:00  Potential applications of metamaterials in micro-electro-mechanical systems
Gabriele Gattere, STMicroelectronics, It

15:30-16:15  Piezoelectric Microacoustic Metamaterials for Advanced Signal Processing and Sensing at Radiofrequency
Cristian Cassella, Northeastern University, USA

16:15-17:00  Reconfigurable topological insulators for mechanical logic
Michael Leamy, Georgia Tech USA

17:00-17:30  Closing

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Topics (in order of appearance)

Richard Craster
Imperial College London, UK

Elastic Metamaterials
This talk will draw upon joint work with many collaborators and aims to give an overview of attempts at vibration control using ideas based upon classical ideas such as band-gaps and also around metamaterials. It will also draw on recent research around seismic metamaterials, energy harvesting and rainbow trapping ideas that combine with topological wave physics. 

Luca Sangiuliano
Phononic Vibes, Italy

Design aspects and industrial challenges of vibroacoustic metamaterial solutions for infrastructure, transportation and appliance sectors.
Metamaterials are noise and vibration solutions that efficiently tackle NVH issues while being competitive in compactness, lightweight design, and performance compared to common noise and vibration mitigation solutions. The application sector and industrial needs have a strong impact on the design aspect of the metamaterial solution. A compromise among performance, costs and manufacturing constraints must be found to bring the metamaterial solution into a competitive product. In this presentation, an overview of the design aspects and industrial challenges of vibroacoustic metamaterial solutions for infrastructure, transportation and appliance sectors will be provided, based on Phononic Vibes’s experience in the field.

Sara Bagherifard
PoliMi, Italy

Modulating mechanical performance in additive manufacturing through surface post-processing and geometric heterogeneity
This presentation covers two active areas in the field of additive manufacturing. The first part focuses on the individual and combined effects of various surface post-treatments designed to address common issues associated with the intrinsic characteristics of Laser Powder Bed Fusion (LPBF), which often lead to the formation of surface defects. The second part explores how geometric heterogeneity can be leveraged to enhance mechanical performance, such as load-bearing capacity and energy absorption, in additive manufactured cellular structures.

Gabriele Gattere

ST Microelectronics, Italy

Potential applications of metamaterials in micro-electro-mechanical systems
Metamaterials, with their unique electromagnetic and mechanical properties, offer new opportunities for Micro-Electro-Mechanical Systems (MEMS). In this talk, we will explore potential applications for this technology, including the development of advanced, more compact, and lightweight devices with superior functionalities compared to traditional technologies.

Cristian Cassella

Northeastern  Univ., USA

Piezoelectric Microacoustic Metamaterials for Advanced Signal Processing and Sensing at Radiofrequency
The talk will explore the initial efforts to leverage acoustic metamaterials at the micro and nanoscale in on-chip piezoelectric microelectromechanical systems (MEMS) for communication and sensing at radiofrequencies (RF). We will demonstrate how the adoption of metamaterials holds the potential to extend the capabilities of RF MEMS, enabling them to surpass the limitations imposed by material properties. The presentation will cover the development of the first RF microacoustic metamaterial filters, constructed using an Aluminum Scandium Nitride piezoelectric film with a thickness in the hundreds of nanometers range. Additionally, we will discuss the first example of thin-film topological RF MEMS and its potential to enhance the spatial sensing resolution and limit of detection in RF MEMS sensors.

Michael Leamy
Georgia Tech, USA

Potential applications of metamaterials in micro-electro-mechanical systems
Topological insulators (TIs), exhibiting topologically-protected edge and interface waves, have recently emerged in phononic systems. Reconfigurability is essential for enabling TI-based applications. One potential means for achieving reconfigurability employs shunted piezoelectric (PZT) disks in which a unit cell’s mechanical impedance is altered using negative capacitance circuits. Dynamic reconfigurability and programmability of such material platforms can then be obtained through simple on/off switching. In this vein, we propose and experimentally verify an electroacoustic TI which exhibits programmable topologically protected edge states useful for acoustic multiplexers, demultiplexers, and transistors. This reconfigurable structure is composed of an elastic hexagonal lattice whose unit cell contains two shunted PZT disks, each connected to a negative capacitance circuit by an on/off switch. Closing one or the other circuit results in the breaking of mirror symmetry and yields mechanical behavior analogous to the quantum valley Hall effect. By interfacing two topologically-distinct materials, a domain wall is introduced exhibiting a localized interface state topologically-protected from backscattering at defects and sharp edges. Through the use of programmable time-division, in which domain walls appear and disappear in time, we demonstrate multiplexing and demultiplexing. We also demonstrate an acoustic transistor using the same programmable platform, before closing with a discussion on future research directions. Acknowledgements: The author would like to acknowledge support of this research from the U.S. National Science Foundation under grant No. 1929849.

— Signup now via the form – Registration closes October 23th 2024 @ 17.00 CET —