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12 November 2014 Invisibility cloaking in the diffusive-light limit (presentation video)
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Albert Einstein’s theory of relativity imposes stringent limitations to making macroscopic objects invisible with respect to electromagnetic light waves propagating in vacuum. These limitations are not relevant though for propagation of light in diffusive media like fog or milk because the effective energy speed is significantly lower than in vacuum due to multiple scattering events. Here, by exploiting the close mathematical analogy between the electrostatic or near-field limit of optics on the one hand and light diffusion on the other hand, we design, fabricate, and characterize simple core-shell cloaking structures for diffusive light propagation in cylindrical and spherical geometry.
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Robert Schittny, Muamer Kadic, and Martin Wegener "Invisibility cloaking in the diffusive-light limit (presentation video)", Proc. SPIE 9160, Metamaterials: Fundamentals and Applications 2014, 91602F (12 November 2014);

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