J. Phys.
[Condensed Matter] |
Volume 15, Page
6345-64 |
2003 |
JB Pendry and SA Ramakrishna
A slab of negatively refracting material, thickness , can focus an image at a distance
from the object.
The negative slab cancels an equal thickness of positive space. This result is
a special case of a much wider class of focussing: any medium can be optically
cancelled by an equal thickness of material constructed to be an inverted
mirror image of the medium, with
reversed in
sign. We introduce the powerful technique of coordinate transformation, mapping
a known system into an equivalent system, to extend the result to a much wider
class of structures including cylinders, spheres, and intersecting planes and
hence show how to produce magnified images. All the images are ‘perfect’ in the
sense that both the near and far fields are brought to a focus and hence reveal
sub wavelength details.
This paper is available as a PDF file.