Fig. 4
From: Observation of reflectionless absorption due to spatial Kramers–Kronig profile
Full-wave simulations to the designed one-dimensional inhomogeneous plate. The simulations are performed at 2.3, 2.4, and 2.5 GHz. a–c The discrete x-dependent Kramers–Kronig (K–K) profiles (open circles) and the corresponding fitted continuous ones (solid lines) at 2.3, 2.4, and 2.5 GHz, respectively. d–f The simulated amplitudes of z-polarized electric fields when a line source is placed at the origin of the plate with the discrete K–K profiles. g–i The simulated amplitudes with the fitted continuous K–K profiles. j–l The intensity drops in dB scale along the x axis at y = 0 for the discrete (open circles) and fitted (solid lines) K–K permittivity profiles. Note that the same absolute color scale is used for all figures from d–i
