Theory of diffusive light scattering cancellation cloaking
  We report on a new concept of cloaking objects in diffusive light regime using the paradigm of the scattering cancellation and mantle cloaking techniques. We show numerically that an object can be made completely invisible to diffusive photon density waves, by tailoring the diffusivity constant of the spherical shell enclosing the object. This means that photons' flow outside the object and the cloak made of these spherical shells behaves as if the object were not present. Diffusive light invisibility may open new vistas in hiding hot spots in infrared thermography or tissue imaging. 
Mohamed Farhat, Pai-Yen Chen, Sebastien Guenneau, Hakan Bagci, Khaled   Nabil Salama, and Andrea Alu
physics.optics