Visible Range Plasmonic Modes on Topological Insulator Nanostructures

A. M. Dubrovkin, G. Adamo, J. Yin, L. Wang, C. Soci, Q. J. Wang and N. I. Zheludev

Advanced Optical Materials (2016)
Surface plasmons are electromagnetic excitations existing at the interface between dielectrics and conductive media, where confined oscillations of electromagnetic fields are coupled to oscillations of free electrons. They are the key to nanophotonic applications such as light-harvesting, biological sensing, ultracompact interchip interconnects, and all-optical data processing chips. Noble metals such as silver, gold, and cooper as well as aluminum support localized and propagating plasmonic excitation. Highly doped semiconductors, transparent conductive oxides, perovskites, metal nitrides, silicides, germanides, and recently discovered 2D materials, such as graphene, have been suggested as new plasmonic materials beyond conventional metals.