Making waves round a structured cloak: lattices, negative refraction and fringes

摘要: Using the framework of transformation optics, this paper presents a detailed analysis non-singular square cloak for acoustic, out-of-plane shear elastic and electromagnetic waves. Analysis wave propagation through is presented accompanied by numerical illustrations. The efficacy regularized demonstrated an objective measure quality cloaking effect provided. It that persists over wide range frequencies. As demonstration effectiveness cloak, Young's double slit experiment presented. stability interference pattern examined when cloaked uncloaked obstacle are successively placed in front one apertures. This novel link with well-known quantum mechanical provides additional method which cloaks may be examined. In second half paper, it shown approximate constructed using discrete lattice structure. efficiency analysed series illustrative simulations effective obtained relatively simple structure, particularly, low-frequency regime.