Work

Nonmagnetic cloak with minimized scattering

Year: 2007

Type: article

Abstract: In an electromagnetic cloak based on a transformation approach, reduced sets of material properties are generally favored due to their easier implementation in reality, although a seemingly inevitable drawback of undesired scattering exists in such cloaks. Here, the authors suggest the use of high-order transformations to create smooth moduli at the outer boundary of the cloak, therefore completely eliminating the detrimental scattering within the limit of geometric optics. The authors apply this scheme to a nonmagnetic cylindrical cloak and demonstrate that the scattered field is reduced substantially in a cloak with optimal quadratic transformation as compared to its linear counterpart.

Source: Applied Physics Letters

DOI: 10.1063/1.2783266

Authors: Wenshan Cai, Uday K. Chettiar, Alexander V. Kildishev, Vladimir M. Shalaev, Graeme W. Milton

Institutions: Purdue University West Lafayette, University of Utah

Language: English

Topic: Metamaterials and Metasurfaces Applications

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funders: National Science Foundation, Multidisciplinary University Research Initiative, Army Research Office

Awards: The Response of Composites and Quasiconvexity, G5485751462