Abstract
AbstractTopological insulators with Dirac conducting surface state and insulating bulk state offer a promising platform for plasmonics with a broad operating frequency range from ultraviolet (UV) to terahertz (THz). Topological insulator plasmonics (TIPs) has become a quickly developing branch of plasmonics since the terahertz (THz) Dirac plasmons was observed from Bi2Te3 topological insulator microribbons in 2013. This chapter mainly introduces plasmonic effects generated in three-dimensional (3D) topological insulator materials as well as their application potentials in light-matter interactions. The effects mainly contain Dirac plasmons, surface plasmon resonances (SPRs), localized plasmon resonances (LPRs), and magnetic plasmon resonances (MPRs) occurring in structured topological insulators. TIPs with the field confinement and enhancement acts as a promising platform for reinforced light-matter interactions. Here, we also discuss the recently reported applications of TIPs, especially in refractive index monitoring, photoluminescent emission, and light harvesting. These results will not only help us to understand plasmonic behaviors and characters of topological insulators, but also provide guidance for exploring their applications in light control and functional devices.KeywordsTopological insulatorsSurface plasmonsLight-matter interactions
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