Metamaterials and the problem of creating invisible objects. 2. Invisible shells that conceal the objects contained in them from an external observers

摘要

Advances in designing and fabricating metamaterials with unique electromagnetic properties have made it possible to raise the question of whether it is possible to create invisible objects. A re_view was presented earlier of papers on the problem of creating invisible objects whose size is less than or of the order of the wavelength of electromagnetic radiation. This paper presents the second part of the review and is concerned with the problem of creating invisible shells of arbi_trary shape that conceal the objects contained in them from an external observer. The results of a theoretical prediction of the structure of such shells are described, based on the method of spatial transformations. Theoretical approaches to the simplification of the structure of the shells and attempts to experimentally implement the simplified shells are presented. The appearance of a new specialization of theoretical optics_transformation optics_is pointed out.