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

Autor:	Hashemi, Hila, Oskooi, A., Joannopoulos, J. D., Johnson, Steven G.
Rok vydání:	2011
Předmět:	Physics - Optics Physics - Instrumentation and Detectors Physics - Popular Physics
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevA.84.023815
Popis:	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. Comment: 7 pages, 3 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1102.3897 Zobrazit plný text záznamu View this record from Arxiv