2023/03/02 by Filipa R. Prudêncio, Mário G. Silveirinha, Prudêncio, Filipa R. +1 · 3 citations
Computer Science · Engineering · Physics and Astronomy · #Applied Physics (physics.app-ph) #Experimental and Theoretical Physics Studies #FOS: Physical sciences #Geophysics and Sensor Technology #Music Technology and Sound Studies #Optics (physics.optics)
paper · pdf · doi:10.48550/arxiv.2303.01565
openalex publication_date 2023/03/02 · openalex created_date 2023/03/07 · openalex updated_date 2026/07/28
Here, we show that isorefractive spacetime crystals with a travelling-wave modulation may mimic rigorously the response of moving material systems. While generic spacetime crystals are characterized by a bi-anisotropic coupling in the co-moving frame, isorefractive crystals have a response that is observer independent, which leads to isotropic constitutive relations free of bianisotropy. We show how to take advantage of this property in the calculation of the band diagrams of isorefractive spacetime crystals in the laboratory frame and in the study of the synthetic Fresnel drag. Furthermore, we discuss the impact of considering either a Galilean or a Lorentz transformation in the homogenization of spacetime crystals, showing that the effective response is independent of the considered transformation.