Curved trajectories on transformed metal surfaces: Beam-splitter, invisibility carpet and black hole for surface plasmon polaritons

Transformational optics is shown to enhance the control of the electromagnetic wave trajectories within metamaterials with unconventional functionalities such as a beam splitter, a toroidal carpet and a black hole, all of which are specially designed for surface plasmon polaritons (SPPs) propagating on a metal plate.

► Splitting of a SPP beam into two beam.
► Confinement of light in a toroidal invisibility carpet.
► Modelling of an optical SPP black hole.