Cloaking through cancellation of diffusive wave scattering.
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.
Division of Computer, Electrical, and Mathematical Sciences and Engineering , King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900, Saudi Arabia.
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0000-0003-0351-4309
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Farhat
Department of Electrical and Computer Engineering , Wayne State University , Detroit, MI 48202, USA.
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Chen
Aix-Marseille Université, CNRS, Centrale Marseille , Institut Fresnel, Campus universitaire de Saint-Jérôme , 13013 Marseille, France.
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Guenneau
Division of Computer, Electrical, and Mathematical Sciences and Engineering , King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900, Saudi Arabia.
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Bağcı
Division of Computer, Electrical, and Mathematical Sciences and Engineering , King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900, Saudi Arabia.
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Salama
Department of Electrical and Computer Engineering , The University of Texas at Austin , Austin, TX 78712, USA.
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Alù
diffusion; metamaterials; resonators