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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 24 — Nov. 22, 2010
  • pp: 24477–24485

Simplified ground plane invisibility cloak by multilayer dielectrics

Xiaofei Xu, Yijun Feng, Zhenzhong Yu, Tian Jiang, and Junming Zhao  »View Author Affiliations


Optics Express, Vol. 18, Issue 24, pp. 24477-24485 (2010)
http://dx.doi.org/10.1364/OE.18.024477


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Abstract

Most implementations of the ground plane invisibility cloak are based on the isotropic design through the quasi-conformal transformation. However recent theoretical analysis predicts the unavoidable lateral shift of the scattering fields associated with these cloaks making them detectable. In this paper, we propose an alternative method to design the ground plane invisibility clock with electromagnetic beam modulation blocks through simple coordinate transformation discussed in our previous work. The ground plane cloak obtained with the rigorous transformation optics possesses moderate anisotropic distributions of material parameters, but results in no lateral shift of the scattering fields. To realize the design, a possible scheme is suggested by discretizing the ground plane cloak to several homogeneous sub-blocks. These sub-blocks can be realized with multilayer isotropic dielectrics with alignment angles that are determined by the effective medium theory. Thus the non-magnetic ground plane invisibility cloak can be constructed by several multilayered normal dielectrics aligned in different angles. The performance of the proposed cloak and its practical implementation is validated by full-wave electromagnetic simulations with both near field distributions and far field scattering patterns under different EM wave incident angles. The proposed cloak is composed of normal dielectric multilayers, thus can leads to easy experimental demonstration of non-magnetic ground plane cloak in the frequency range from microwave to optical.

© 2010 OSA

OCIS Codes
(160.1190) Materials : Anisotropic optical materials
(260.2065) Physical optics : Effective medium theory
(160.3918) Materials : Metamaterials
(230.3205) Optical devices : Invisibility cloaks

ToC Category:
Physical Optics

History
Original Manuscript: August 18, 2010
Revised Manuscript: October 26, 2010
Manuscript Accepted: October 28, 2010
Published: November 9, 2010

Citation
Xiaofei Xu, Yijun Feng, Zhenzhong Yu, Tian Jiang, and Junming Zhao, "Simplified ground plane invisibility cloak by multilayer dielectrics," Opt. Express 18, 24477-24485 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-24-24477


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