Terahertz Plasmonic Excitations in Topological Insulators

摘要

Dirac Plasmon excitations in the terahertz (THz) range have been discovered in Bi2Se3 topological insulator films patterned in form of micro-structures. The plasmon linewidth was found to remain nearly constant at temperatures between 6 K and 300 K, as expected when exciting topological carriers.