General scaling limitations of ground-plane and isolated-object cloaks

Details General scaling limitations of ground-plane and isolated-object cloaks General scaling limitations of ground-plane and isolated-object cloaks

2011-02-18

arxiv.org/abs/1102.3897v3

Physics

Optics

7 pages, 3 figures

Scientific paper

10.1103/PhysRevA.84.023815

We prove that, for arbitrary three-dimensional transformation-based invisibility cloaking of an object above a ground plane or of isolated object, there are practical constraints that increase with the object size. In particular, we show that the cloak thickness must scale proportional to the thickness of the object being cloaked, assuming bounded refractive indices, and that absorption discrepancies and other imperfections must scale inversely with the object thickness. For isolated objects, we also show that bounded refractive indices imply a lower bound on the effective cross-section.

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