Cross-section comparisons of cloaks designed by transformation optical and optical conformal mapping approaches

Urzhumov, YA

Kundtz, NB

Smith, DR

Pendry, JB

2012-05-29T21:30:57Z

2011-02-01

We review several approaches to optical invisibility designed using transformation optics (TO) and optical conformal mapping (CM) techniques. TO is a general framework for solving inverse scattering problems based on mimicking spatial coordinate transformations with distributions of material properties. There are two essential steps in the design of TO media: first, a coordinate transformation that achieves some desired functionality, resulting in a continuous spatial distribution of constitutive parameters that are generally anisotropic; and, second, the reduction of the derived continuous constitutive parameters to a metamaterial that serves as a stepwise approximation. We focus here on the first step, discussing the merits of various TO strategies proposed for the long-sought 'invisibility cloak'-a structure that renders opaque objects invisible. We also evaluate the cloaking capabilities of structures designed by the related CM approach, which makes use of conformal mapping to achieve index-only material distributions. The performance of the various cloaks is evaluated and compared using a universal measure-the total (all-angle) scattering cross section. © 2011 IOP Publishing Ltd.

US Army Research Office (contract no. W911NF-09-1-0539)

2040-8986

2040-8978

https://hdl.handle.net/10161/5724

en_US

IOP Publishing

Journal of Optics

10.1088/2040-8978/13/2/024002

IOP Publishing Ltd.

Cross-section comparisons of cloaks designed by transformation optical and optical conformal mapping approaches

Journal article

13

024002

2

Duke

Electrical and Computer Engineering

Pratt School of Engineering

Published

13