2024/04/13 by Kshiteej J. Deshmukh, Deshmukh, Kshiteej J. · 1 citation
Engineering · Health Professions · Materials Science · #Acoustic Wave Phenomena Research #Applied Physics (physics.app-ph) #FOS: Physical sciences #Metamaterials and Metasurfaces Applications #Noise Effects and Management #Optics (physics.optics)
paper · pdf · doi:10.48550/arxiv.2404.09060
openalex publication_date 2024/04/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Space-time metamaterials, or materials with properties changing in space and time, have gained a wide-spread interest due to their exotic properties. In this Letter, we propose a novel temporal metasurface of phononic crystals in one and two-dimensions, that combines the use of nonlocal interactions in phononic crystals to customize dispersion relations, and the use of temporal interfaces to transition from a local material to a nonlocal material and vice-versa, to achieve the interesting phenomenon of wave-freezing, where the entire propagating wave is stopped without diffusing or spreading. The phononic crystals are modeled using spring-mass systems and we use finite difference calculations to present our numerical results. We also demonstrate other effects observed in such temporal metasurfaces, such as time-reversed waves, and anomalous temporal refraction.