https://doi.org/10.1051/epjam/2017011
Research Article
Negative index effects from a homogeneous positive index prism
1
Rafael Advanced Defense Systems, Ltd.,
Haifa, Israel
2
Faculty of Electrical Engineering, Technion, Israel Institute of Technology,
Haifa, Israel
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Received:
4
September
2017
Accepted:
25
October
2017
Published online: 1 December 2017
Abstract
Cellular structured negative index metamaterials in the form of a right triangular prism have often been tested by observing the refraction of a beam across the prism hypotenuse which is serrated in order to conform to the cell walls. We show that not only can this negative index effect be obtained from a homogeneous dielectric prism having a positive index of refraction, but in addition, for sampling at the walls of the cellular structure, the phase in the material has the illusory appearance of moving in a negative direction. Although many previous reports relied on refraction direction and phase velocity of prism structures to verify negative index design, our investigation indicates that to unambiguously demonstrate material negativity additional empirical evidence is required.
© S.W. Marcus and A. Epstein, published by EDP Sciences, 2017
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.
