Topological insulators is a rapidly depeloving field of condensed matter physics. Such systems possess band gap in the bulk and special, so-called topologically protected, edge or surface states. Recently, a significant progress has been made in the study of the topological edge states of photons in various structures. Their specific feature is a robustness against a wide class of external perturbations and disorder.
During this talk a short review will be presented along with new theoretical result: optical analogue of Kitaev's toy model for Majorana fermions in the chains of plasmonic nanoparticles.