Surface plasmon polaritons (SPP), electromagnetic waves coupled to collective free electron oscillations in metal, are of great interest in many fields of science and technology. This branch, which has recently undergone very rapid growth, gives hope to obtain new generation of very fast computer chips, produce more sensitive detectors, directly visualize fragile nanoobjects and design new metamaterials, which are responsible for interesting and counterintuitive phenomena such as reverse refraction and electromagnetic cloaking. The most interesting features and applications of SPP in various fields of technology are presented.
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