Gradient Index Metamaterial Based on Slot Elements
Optics
2015-05-18 v1
Abstract
We present a gradient-index (GRIN) metamaterial based on an array of annular slots. The structure allows a large variation of the effective refractive index under normal-to-plane incidence and thus enables the construction of GRIN devices consisting of only a small number of functional layers. Using full-wave simulations, we demonstrate the annular slot concept by means of a 3-unit-cell thin GRIN lens for the terahertz (THz) range. In the presented realizations, we achieved an index contrast of Delta n = 1.5 resulting in a highly refractive lens suitable for focusing THz radiation to a spot size smaller than the wavelength.
Keywords
Cite
@article{arxiv.1002.1025,
title = {Gradient Index Metamaterial Based on Slot Elements},
author = {Oliver Paul and Benjamin Reinhard and Bernd Krolla and Rene Beigang and Marco Rahm},
journal= {arXiv preprint arXiv:1002.1025},
year = {2015}
}
Comments
4 pages, 5 figures