Electromagnetic cloaking by layered structure of
homogeneous isotropic materials
Ying Huang, Yijun Feng, Tian Jiang
Department of Electronic Science and Engineering, Nanjing University, Nanjing, 210093, CHINA
yjfeng@nju.edu.cn
Abstract: Electromagnetic invisibility cloak requires material with
anisotropic distribution of the constitutive parameters as first proposed by
Pendry et al. [Science 312, 1780 (2006)]. In this paper, we proposed an
electromagnetic cloak structure that does not require metamaterials with
subwavelength structured inclusions to realize the anisotropy or
inhomogeneity of the material parameters. We constructed a concentric
layered structure of alternating homogeneous isotropic materials that can be
treated as an effective medium with the required radius-dependent
anisotropy. With proper design of the permittivity or the thickness ratio of
the alternating layers, we demonstrated the low-reflection and power-flow
bending properties of the proposed cloaking structure through rigorous
analysis of the scattered electromagnetic fields. The proposed cloaking
structure could be possibly realized by normal materials, therefore may lead
to a practical path to an experimental demonstration of electromagnetic
cloaking, especially in the optical range.
©2007 Optical Society of America
OCIS codes: (160.1190) Anisotropic optical materials; (230.0230) Optical devices; (260.2110)
Electromagnetic theory.
References and links
1. J. B. Pendry, D. Schurig, and D. R. Smith, “Controlling Electromagnetic Fields,” Science 312, 1780-1782
(2006).
2. A. Alu and N. Engheta, “Achieving transparency with plasmonic and metamaterial coatings,” Phys. Rev. E
72, 016623 (2005).
3. U. Leonhardt, “Optical conformal mapping,” Science 312, 1777-1780 (2006).
4. D. Schurig, J. B. Pendry and D. R. Smith. “Calculation of material properties and ray tracing in
transformation media.” Optics Express 14, 9794-9840 (2006).
5. S. A. Cummer, B-I Popa, D. Schurig, D. R. Smith and J. B. Pendry, “Full-wave simulations of
electromagnetic cloaking structures,” Phys. Rev. E 74, 036621 (2006).
6. F. Zolla, S. Guenneau, A. Nicolet and J.B. Pendry, “Electromagnetic analysis of cylindrical invisibility
cloaks and the mirage effect,” Optics Letters 32, 1069-1071 (2007).
7. D. Schurig, J. J. Mock, B. J. Justice, S. A. Cummer, J. B. Pendry, A. F. Starr and D. R. Smith.
“Metamaterial Electromagnetic Cloak at Microwave Frequencies,” Science 314, 977-980 (2006).
8. W. Cai U. K. Chettiar, A. V. Kildishev and V. M. Shalaev, “Optical cloaking with metamaterials,” Nature
Photonics, vol.1, 224-227 (2007).
9. G.W. Milton, N.A. Nicorovici, “On the cloaking effects associated with anomalous localized resonance,”
Proceedings London Royal Society A 462, 3027-3059 (2006).
10. B. Wood, J. B. Pendry, and D. P. Tsai, “Directed subwavelength imaging using a layered metal-dielectric
system.” Phys. Rev. B 74, 115116 (2006).
11. A. A. Govyadinov and V. A. Podolskiy, “Metamaterial photonic funnels for subdiffraction light
compression and propagation,” Phys. Rev. B 73, 155108 (2006).
12. Z. Jacob, L. V. Alekseyev, E. Narimanov, “Optical Hyperlens: Far-field imaging beyond the diffraction
limit.” Opt. Express 14, 8247-8256 (2006).
13. A. Salandrino, N. Engheta, “Far-field subdiffraction optical microscopy using metamaterial crystals:
Theory and simulations.” Phys. Rev. B 74, 075103 (2006).
#85307 - $15.00 USD Received 18 Jul 2007; revised 14 Aug 2007; accepted 17 Aug 2007; published 21 Aug 2007
(C) 2007 OSA 3 September 2007 / Vol. 15, No. 18 / OPTICS EXPRESS 11133