Freestanding metasurfaces for optical frequencies
Optics
2019-05-01 v1
Abstract
We present freestanding metasurfaces operating at optical frequencies with a total thickness of only 40nm. The metasurfaces are fabricated by focused ion beam milling of nanovoids in a carbon film followed by thermal evaporation of gold and plasma ashing of the carbon film. As a first example, we demonstrate a metasurface lens based on resonant V-shaped nanovoids with a focal length of 1mm. The second example is a metasurface phase-plate consisting of appropriately oriented rectangular nanovoids that transforms a Gaussian input beam into a Laguerre-Gaussian mode.
Cite
@article{arxiv.1902.02667,
title = {Freestanding metasurfaces for optical frequencies},
author = {M. Prämassing and T. Leuteritz and A. Faßbender and H. J. Schill and S. Irsen and S. Linden},
journal= {arXiv preprint arXiv:1902.02667},
year = {2019}
}