Minimizing the scattering of a nonmagnetic cloak

Jingjing Zhang; Yu Luo; Asger Mortensen

doi:10.1063/1.3366726

Minimizing the scattering of a nonmagnetic cloak

Jingjing Zhang, Yu Luo, Asger Mortensen

Imperial College London

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Abstract

Nonmagnetic cloak offers a feasible way to achieve invisibility at optical frequencies using materials with only electric responses. In this letter, we suggest an approximation of the ideal nonmagnetic cloak and quantitatively study its electromagnetic characteristics using a full-wave scattering theory. It is demonstrated that the forward scattering of the impedance matched cloak increases dramatically as the thickness of the cloak decreases. Nevertheless, it is still possible to effectively reduce the total scattering cross section with a very thin cloak whose impedance is not matched to the surrounding material at the outer boundary. Our analysis also provides the flexibility of reducing the scattering in an arbitrary direction.

Original language	English
Journal	Applied Physics Letters
Volume	96
Issue number	11
Pages (from-to)	113511
ISSN	0003-6951
DOIs	https://doi.org/10.1063/1.3366726
Publication status	Published - 2010

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Copyright (2010) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.

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AB - Nonmagnetic cloak offers a feasible way to achieve invisibility at optical frequencies using materials with only electric responses. In this letter, we suggest an approximation of the ideal nonmagnetic cloak and quantitatively study its electromagnetic characteristics using a full-wave scattering theory. It is demonstrated that the forward scattering of the impedance matched cloak increases dramatically as the thickness of the cloak decreases. Nevertheless, it is still possible to effectively reduce the total scattering cross section with a very thin cloak whose impedance is not matched to the surrounding material at the outer boundary. Our analysis also provides the flexibility of reducing the scattering in an arbitrary direction.

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Minimizing the scattering of a nonmagnetic cloak

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