  In this work, we investigate the response of epsilon-near-zero (ENZ)
metamaterials and plasmonic materials to electromagnetic source excitation. The
use of these media for tailoring the phase of radiation pattern of arbitrary
sources is proposed and analyzed numerically and analytically for some
canonical geometries. In particular, the possibility of employing planar
layers, cylindrical shells or other more complex shapes made of such materials
in order to isolate two regions of space and to tailor the phase pattern in one
region, fairly independent of the excitation shape present in the other, is
demonstrated with theoretical arguments and some numerical examples. Physical
insights into the phenomenon are also presented and discussed together with
potential applications of the phenomenon.

Materials Science