Focusing of light by a nanohole array
Abstract
The authors demonstrate a mechanism for focusing at optical frequencies based on the use of nanohole quasiperiodic arrays in metal screens. Using coherent illumination at 660nm and scanning aperture optical microscopy, ∼290nm "hot spots" were observed at a distance of ∼12.5μm from the array. Even smaller hot spots of about ∼200nm in waist were observed closer to the plane of the array.
- Publication:
-
Applied Physics Letters
- Pub Date:
- February 2007
- DOI:
- 10.1063/1.2710775
- arXiv:
- arXiv:physics/0611056
- Bibcode:
- 2007ApPhL..90i1119H
- Keywords:
-
- 78.67.Bf;
- Nanocrystals and nanoparticles;
- Physics - Optics
- E-Print:
- doi:10.1063/1.2710775