Title :
Terahertz plasmonic excitations in Bi2Se3 topological insulator
Author :
Di Pietro, P. ; Autore, M. ; D´Apuzzo, F. ; Di Gaspare, Alessandra ; Giorgianni, F. ; Limaj, O. ; Oh, Sung-Min ; Lupi, S.
Author_Institution :
Sincrotrone Trieste S.C.p.A., Trieste, Italy
Abstract :
Plasmons in the terahertz (THz) range have been observed in Bi2Se3 topological insulator films patterned in form of microstructures. These plasmons have been assigned to collective excitations of massless Dirac carriers located onto the Bi2Se3 topological surfaces. Their lifetime is mainly determined by the single-particle scattering rate and results scarcely dependent on temperature as expected for topological carriers.
Keywords :
electromagnetic wave scattering; insulators; plasmonics; plasmons; Bi2Se3; massless Dirac carriers; microstructures; plasmons; single-particle scattering rate; terahertz plasmonic excitations; topological carriers; topological insulator films; topological surfaces; Dispersion; Graphene; Optical films; Optical polarization; Plasmons; Topological insulators;
Conference_Titel :
Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS), 2014 8th International Congress on
Conference_Location :
Lyngby
Print_ISBN :
978-1-4799-3450-8
DOI :
10.1109/MetaMaterials.2014.6948565
