2021/03/20 by Karol Karpiński, Karpiński, Karol, Sylwia Zielińska - Raczyńska +3
Physics and Astronomy · #Computational Physics (physics.comp-ph) #FOS: Physical sciences #physics.comp-ph
paper · pdf · doi:10.48550/arxiv.2103.11222
5 pages, 4 figures
arxiv created 2021/03/20 · arxiv updated 2021/03/23
A modification of the Drude dispersive model based on fractional time derivative is presented. The dielectric susceptibility is calculated analytically and simulated numerically, showing a good agreement between theoretical description and numerical results. The absorption coefficient and wave vector -- key parameters describing the propagation of waves in such a medium -- are shown to follow a power law in the frequency domain, which is a common phenomenon in many real life applications. The introduction of two separate parameters provides a more flexible model than some other approaches found in literature and is well suited for numerical implementation.