Title :
Holography-Inspired Screens for Sub-Wavelength Focusing in the Near Field
Author :
Eleftheriades, George V. ; Wong, A.M.H.
Author_Institution :
Univ. of Toronto, Toronto
fDate :
4/1/2008 12:00:00 AM
Abstract :
Inspired by the principle of holography we present a concept for making simple transmission screens that can focus an incident wave into a sub-wavelength spot in the near field. The screen is made out of closely spaced, unequal slits cut on a metallic sheet. Fullwave simulations are presented for an example screen that focuses an incident plane wave down to a spot having a peak-to-null beamwidth equal to lambda/10 .
Keywords :
diffraction; fibre optic sensors; holographic optical elements; metamaterials; optical focusing; screens (display); diffraction limit; evanescent waves; fullwave simulation; holography; metamaterials; peak-to-null beamwidth; subwavelength focusing; transmission screens; Diffraction limit; evanescent waves; holography; metamaterials; super-lenses;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2008.918871
