Full-wave finite-difference time-domain simulation of electromagnetic cloaking structures

Authors

Yan Zhao, University of London - Queen Mary and Westfield CollegeFollow
Christos Argyropoulos, University of London - Queen Mary and Westfield CollegeFollow
Yang Hao, University of London - Queen Mary and Westfield College

Date of this Version

2008

Citation

28 April 2008 / Vol. 16, No. 9 / OPTICS EXPRESS 6717

Comments

© 2008 Optical Society of America

Abstract

This paper proposes a radial dependent dispersive finitedifference time-domain method for the modeling of electromagnetic cloaking structures. The permittivity and permeability of the cloak are mapped to the Drude dispersion model and taken into account in dispersive FDTD simulations. Numerical simulations demonstrate that under ideal conditions, objects placed inside the cloak are ‘invisible’ to external electromagnetic fields. However for the simplified cloak based on linear transformations, the back scattering has a similar level to the case of a PEC cylinder without any cloak, rendering the object still being ‘visible’. It is also demonstrated numerically that the simplified cloak based on high-order transformations can indeed improve the cloaking performance.