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International Journal of Optics
Volume 2012 (2012), Article ID 120731, 6 pages
http://dx.doi.org/10.1155/2012/120731
Research Article

Anomalous Propagation in Low Index Contrast Metamaterials: Assessment of the Beam Collimation Condition

1Department of Electrical and Computer Engineering, Rutgers University, Piscataway, NJ 08854, USA
2Institute for Advanced Materials, Devices, and Nanotechnology, Rutgers University, Piscataway, NJ 08854, USA

Received 1 June 2012; Accepted 10 August 2012

Academic Editor: Georgios Veronis

Copyright © 2012 Jun Tan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Anomalous beam propagation in low index-contrast metamaterials has been analyzed. The condition for a well-collimated beam is found to be depending on the beam width and the pertinent Fourier component of the dielectric function. Guided by this condition, an ultra-compact metamaterial structure is designed to deflect a light beam at a wide angle. The structure is tolerant to structural parameter deviation and has a wide bandwidth.