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.