data i miejsce: 14.05.2025 godz. 11:00, sala 106 bud A-29
temat: Non-local Metamaterials and Waves
prelegent: prof. Muamer Kadic (Université Marie et Louis Pasteur, Institut FEMTO-ST, CNRS, 25000 Besançon, France)

Abstract:
Non-local metamaterials [1-4] exhibit significant departures from traditional local materials, enabling enhanced control over wave propagation and manipulation. By incorporating concepts from quantum fluid dynamics, we examine the emergence of roton-like excitations, which reveal novel behaviors in these structured media. The analysis employs advanced theoretical frameworks and computational models to demonstrate the impact of non-locality on mechanical and acoustic wave phenomena. Experimental validation is achieved through bespoke metamaterial designs, showcasing robust performance across various frequency ranges.
[1] Iglesias Martínez, Julio Andrés, et al. "Experimental observation of roton-like dispersion relations in metamaterials." Science advances 7.49 (2021): eabm2189.
[2] Chen, Yi, Muamer Kadic, and Martin Wegener. "Roton-like acoustical dispersion relations in 3D metamaterials." Nature communications 12.1 (2021): 3278.
[3] Wang, Ke, et al. "Nonlocal interaction engineering of 2D roton-like dispersion relations in acoustic and mechanical metamaterials." Communications Materials 3.1 (2022): 35.
[4] Chen, Yi, et al. "Nonlocal Cable-Network Metamaterials." Advanced Materials 35.15 (2023): 2209988.