Letter abstract
Nature Photonics 1, 224 - 227 (2007)
Published online: 2 April 2007 | doi:10.1038/nphoton.2007.28
Subject Category: Novel materials and engineered structures
Optical cloaking with metamaterials
Wenshan Cai1, Uday K. Chettiar1, Alexander V. Kildishev1 & Vladimir M. Shalaev1
Abstract
Artificially structured metamaterials have enabled unprecedented flexibility in manipulating electromagnetic waves and producing new functionalities, including the cloak of invisibility based on coordinate transformation1, 2, 3. Unlike other cloaking approaches4, 5, 6, which are typically limited to subwavelength objects, the transformation method allows the design of cloaking devices that render a macroscopic object invisible. In addition, the design is not sensitive to the object that is being cloaked. The first experimental demonstration of such a cloak at microwave frequencies was recently reported7. We note, however, that that design7 cannot be implemented for an optical cloak, which is certainly of particular interest because optical frequencies are where the word 'invisibility' is conventionally defined. Here we present the design of a non-magnetic cloak operating at optical frequencies. The principle and structure of the proposed cylindrical cloak are analysed, and the general recipe for the implementation of such a device is provided.
- School of Electrical and Computer Engineering and Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, USA
Correspondence to: Vladimir M. Shalaev1 e-mail: shalaev@purdue.edu
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