Focusing of Light by a Nano-Hole Array
Optics
2015-06-26 v1
Abstract
We demonstrate a conceptually new mechanism for sub-wavelength focusing at optical frequencies based upon the use of nano-hole quasi-periodic arrays in metal screens. Using coherent illumination at 660 nm and scanning near-field optical microscopy, ~290 nm "hot spots", were observed at a distance of ~12.5 mkm from the array. Even smaller hot-spots of about 200 nm in waist were observed closer to the plane of the array.
Cite
@article{arxiv.physics/0611056,
title = {Focusing of Light by a Nano-Hole Array},
author = {Fu Min Huang and Yifang Chen and F. Javier Garcia de Abajo and Nikolay Zheludev},
journal= {arXiv preprint arXiv:physics/0611056},
year = {2015}
}