PLANAR MULTILAYERED-MEDIUM AND SUPERLENS EFFECT OF LEFT-HANDED MATERIALS

Abstract

We investigate the emission of an atomic dipole in three-dimensional space placed in a planar multilayered medium and consider the imaging effect on the other side of left-handed material slab (LHM). We focus on investigating the possibility of improving the image quality in the z-direction and observing the shrinking of the image size thanks to the effect of recovering lost information transmitted by the evanescent field of a LHM slab. We also find that the focal point is displaced from the ideal position in an unusual way, when the material absorption of the slab changes, which is not simply explained by Snell's law. By separating the two terms describing the propagation wave and the evanescent wave in the expression of the Green tensor, we can show the effect of the evanescent field in improving the image quality.