Figure 3
From: First experimental demonstration of an isotropic electromagnetic cloak with strict conformal mapping
Unidirectional cloak.
(a) Permittivity profile for the discrete device implemented here and (b) a photograph of the implemented device placed on the measurement platform. The relative permittivity has a distribution from 1 to 14.3, which changes dramatically around the invisible hole. Filling powders of different dielectric constants are used here. The white lines in (a) profile the discrete elements implemented. The red arrow in (b) represents the incident wave direction parallel to the red lines in Fig. 1b.
