Cloaking through cancellation of diffusive wave scattering

Abstract
A new cloaking mechanism, which makes enclosed objects invisible to diffusive photon density waves, is proposed. First, diffusive scattering from a basic core-shell geometry, which represents the cloaked structure, is studied. The conditions of scattering cancellation in a quasi-static scattering regime are derived. These allow for tailoring the diffusivity constant of the shell enclosing the object so that the fields scattered from the shell and the object cancel each other. This means that the photon flow outside the cloak behaves as if the cloaked object were not present. Diffusive light invisibility may have potential applications in hiding hot spots in infrared thermography or tissue imaging. © 2016 The Author(s) Published by the Royal Society. All rights reserved.

Citation
Farhat M, Chen PY, Guenneau S, Bağcı H, Salama KN, et al. (2016) Cloaking through cancellation of diffusive wave scattering. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Science 472: 20160276. Available: http://dx.doi.org/10.1098/rspa.2016.0276.

Acknowledgements
S.G. would like to acknowledge a funding of the European Research Council through ERC grant ANAMORPHISM. A.A. would like to acknowledge the National Science Foundation with grant No. ECCS-0953311, the Air Force Office of Scientific Research with grant No. FA9550-13-1-0204, and the Defense Threat Reduction Agency with grant No. HDTRA1-12-1-0022.

Publisher
The Royal Society

Journal
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences

DOI
10.1098/rspa.2016.0276

Additional Links
http://rspa.royalsocietypublishing.org/content/472/2192/20160276

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