Open AccessFrequency domain transformation optics for diffusive photon density waves’ cloaking
Author(s) -
Mohamed Farhat,
Sébastien Guenneau,
Tania M. Puvirajesinghe,
Fahhad H. Alharbi
Publication year - 2018
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.024792
Subject(s) - cloaking , optics , physics , transformation optics , cloak , photon diffusion , photon , scattering , thermal diffusivity , light scattering , geometrical optics , ray , electromagnetic radiation , absorption (acoustics) , mie scattering , metamaterial , quantum mechanics , light source
We make use of transformation optics technique to realize cloaking operation in the light diffusive regime, for spherical objects. The cloak requires spatially heterogeneous anisotropic diffusivity, as well as spatially varying speed of light and absorption. Analytic calculations of Photon's fluence confirm minor role of absorption in reduction of far-field scattering, and a monopole fluence field converging to a constant in the static regime in the invisibility region. The latter is in contrast to acoustic and electromagnetic cloaks, for which the field vanishes inside the core. These results are finally discussed in the context of mass diffusion, where cloaking can be achieved with a heterogeneous anisotropic diffusivity.