In recent years intensive investigations of surface plasmon polaritons have been made in the promising context of nanophotonics. This book discusses the experimental realization of key high efficiency two-dimensional optical elements, built up from metal nanostructures, such as nanoparticles and nanowires to manipulate plasmon polaritons propagating on metal surface. This book also presents several examples of two-dimensional nanooptical devices fabricated and studied in recent years.