Backward wave radiation from negative permittivity waveguides and its use for THz subwavelength imaging.
In this paper we demonstrate the possibility of backward radiation from a negative permittivity planar (slab) waveguide. Furthermore, we show that backward radiation can be used to achieve sub-wavelength imaging of a point source placed close to such a slab or to a periodic layered system of slabs. Finally, we demonstrate backward-radiation-based imaging in the case of realistic materials operating in the THz regime, such as polaritonic alkali-halide systems.
Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology Hellas (FORTH), P.O. Box 1385, 71110 Heraklion, Crete, Greece. basharin@iesl.forth.gr
Alexey A
AA
Basharin
Maria
M
Kafesaki
Eleftherios N
EN
Economou
Costas M
CM
Soukoulis