A Radially-Dependent Dispersive Finite-Difference Time-Domain Method for the Evaluation of Electromagnetic Cloaks

Author

Argyropoulos, Christos ; Zhao, Yan ; Hao, Yang

Author_Institution

Dept. of Electron. Eng., Univ. of London, London

Volume

57

Issue

5

fYear

2009

fDate

5/1/2009 12:00:00 AM

Firstpage

1432

Lastpage

1441

Abstract

A radially-dependent dispersive finite-difference time-domain (FDTD) method is proposed to simulate electromagnetic cloaking devices. The Drude dispersion model is applied to model the electromagnetic characteristics of the cloaking medium. Both lossless and lossy cloaking materials are examined and their operating bandwidth investigated. It is demonstrated that the perfect ldquoinvisibilityrdquo of electromagnetic cloaks is only available for lossless metamaterials and within an extremely narrow frequency band.

Keywords

electromagnetic devices; finite difference time-domain analysis; metamaterials; Drude dispersion model; FDTD; cloaking materials; electromagnetic cloaks; lossless metamaterials; radially-dependent dispersive finite-difference time-domain method; Bandwidth; Dispersion; Electromagnetic devices; Electromagnetic modeling; Electromagnetic propagation; Finite difference methods; Frequency; Metamaterials; Optical sensors; Time domain analysis; Cloaking; finite-difference time-domain (FDTD); metamaterials;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2009.2016704

Filename

4909461