Slanted layered superlenses for subwavelength light manipulation

We demonstrate numerically the operation of optical microelements consisting of metal-dielectric multilayers with slanted edges. We show examples of optical devices for imaging with sub-wavelength resolution, for focusing in a sub-wavelength-sized area, for manipulation of the state of polarisation, and for cross-coupling between the propagating and evanescent parts of the spatial spectrum. The multilayers that are used by us consist of silver and a high refractive index dielectric and may be regarded as optimised low-loss metamaterials with a large effective anisotropy, with reduced Fabry-Perot resonances, with impedance matched to the host medium and with diffraction-free properties. The metamaterials are designed by us with the transfer matrix method and with use of the framework of linear-shift-invariant systems, while the device as a whole is analysed using the finite difference time domain method.