Open Access
Issue
EPJ Applied Metamaterials
Volume 1, 2014
Article Number 8
Number of page(s) 10
DOI http://dx.doi.org/10.1051/epjam/2015002
Published online 06 April 2015

© Y. He and G.V. Eleftheriades, Published by EDP Sciences, 2015

Licence Creative Commons
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.