Issue Eur. Phys. J. Appl. Phys. Volume 44, Number 2, November 2008 Page(s) 181 - 185 Section Physics of Energy Generation, Conversion and Storage DOI 10.1051/epjap:2008152 Published online 21 August 2008

Eur. Phys. J. Appl. Phys. 44, 181-185 (2008)
DOI: 10.1051/epjap:2008152

Non-rotationally invariant invisibility cloaks and concentrators of EM Waves

G.X. Yu^{1, 2}, W.X. Jiang¹, X.Y. Zhou¹ and T.J. Cui<sup>1

1</sup>  State Key Laboratory of Millimeter Waves, Department of Radio Engineering Southeast University, Nanjing 210096, P.R. China
²  College of Information Science and Technology Nanjing Forestry University, Nanjing 210037, P.R. China

wxjiang@emfield.org
tjcui@seu.edu.cn

Received: 11 June 2008 / Received in final form: 29 June 2008 / Accepted: 22 July 2008 / Published online: 21 August 2008

Abstract
We present electromagnetic invisible cloaks and concentrators which are composed of inhomogeneous and anisotropic metamaterials with a square-shaped outer boundary and a circular-shaped inner boundary. Using the technique of coordinate transformation, closed-form formulations of the permittivity and permeability tensors have been derived for the metamaterials to realize the invisible cloaking and to concentrate electromagnetic waves. Full-wave simulation results are given to validate the non-rotationally invariant cloaks and concentrators.

PACS
41.20.Jb - Electromagnetic wave propagation; radiowave propagation.
42.25.Gy - Edge and boundary effects; reflection and refraction.
42.79.Dj - Gratings.

© EDP Sciences 2008

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