Magnification of subwavelength field distributions using a tapered array of metallic wires with planar interfaces and an embedded dielectric phase compensator

Abstract

We report the magnification of subwavelength field distributions using a tapered array of metallic wires with planar front and back interfaces through numerical simulations and experiments. It is demonstrated that subwavelength images with a resolution of one-fifteenth of a wavelength can be transferred to a distance of three wavelengths with a threefold magnification. We also propose embedding a dielectric phase compensator in the tapered array to compensate the phase differences introduced by the different lengths of wires and significantly improve the operational bandwidth of the image transmission and magnification device. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.