Sub-wavelength imaging by space dilation

TL;DR

This paper introduces flat lenses inspired by transformation optics that enable sub-wavelength imaging by magnifying high spatial frequency details without evanescent wave conversion, using anisotropic inhomogeneous media.

Contribution

It presents a novel optical system employing transformation-optics inspired flat lenses to achieve sub-wavelength imaging through space dilation.

Findings

Numerical simulations demonstrate effective magnified imaging of sub-wavelength details.

The system processes high spatial frequencies without converting them into evanescent waves.

Abstract

Two transformation-optics inspired flat lenses are used to build up an optical system capable to transpose an area surrounding the object focal point in a magnified area surrounding the image focal point. The object and image focal points of the system are placed in the free space and respectively a dilated space having a sub-unitary relative permittivity and permeability. The anisotropic and inhomogeneous media constituting the lenses enable the processing of the high spatial frequencies waves without converting them in evanescent waves. Numerical simulations show the capability of the proposed device to perform magnified discernible images of the sub-wavelength details.