Transient States to Control the Electromagnetic Response of Space-time Dispersive Media Zapata Cano, Pablo H. Moreno Rodríguez, Salvador Amanatiadis, Stamatios Alex Amor, Antonio Zaharis, Zaharias D. Molero Jiménez, Carlos Space-time Dispersive Materials Transient analysis Drude material In this paper, we study the dynamic formation of transients when plane waves impinge on a dispersive slab that abruptly changes its electrical properties in time. The time-varying slab alternates between air and metal-like states, whose frequency dispersion is described by the Drude model. It is shown how the physics of this complex system can be well described with the joint combination of two terms: one associated with temporal refractions and the other associated with spatial refractions. To test the validity of the approach, some analytical results are compared with a self-implemented finite-difference time-domain method. Results show how the transients that occur after the abrupt temporal changes can shape the overall steady-state response of the space-time system. In fact, far from always being detrimental, these transient states can be conveniently used to perform frequency conversion or to amplify or attenuate the electromagnetic fields. 2024-12-19T07:04:40Z 2024-12-19T07:04:40Z 2024-12-10 journal article P. H. Zapata-Cano, S. Moreno-Rodríguez, S. Amana- tiadis, A. Alex-Amor, Z. D. Zaharis, and C. Molero, Transient states to control the electromagnetic response of space-time dispersive media, Phys. Rev. B 110, 235125 (2024) https://hdl.handle.net/10481/98253 10.1103/PhysRevB.110.235125 eng open access American Physical Society