Title :
Plasmonic excitations in Bi2Se3 topological insulator
Author :
Di Pietro, P. ; Ortolani, Michele ; Limaj, O. ; Di Gaspare, Alessandra ; Giliberti, Valeria ; Giorgianni, F. ; Brahlek, Matthew ; Bansal, N. ; Koirala, Nikesh ; Oh, Sung-Min ; Calvani, P. ; Lupi, S.
Author_Institution :
Dipt. di Fis., Univ. di Roma La Sapienza, Rome, Italy
Abstract :
We first report evidence by using terahertz (THz) spectroscopy of plasmonic excitations in a topological insulator (TI) that was engineered in thin micro-ribbon arrays. Plasmons are due to Dirac quasi-particles of the two-dimensional electron gas which forms at the surface of TIs.
Keywords :
bismuth compounds; plasmonics; plasmons; terahertz wave spectra; topological insulators; two-dimensional electron gas; Bi2Se3; Dirac quasiparticles; micro-ribbon arrays; plasmonic excitations; terahertz spectroscopy; topological insulator; two-dimensional electron gas; Absorption; Dispersion; Graphene; MODFETs; Phonons; Plasmons; Topological insulators;
Conference_Titel :
Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2013 38th International Conference on
Conference_Location :
Mainz
DOI :
10.1109/IRMMW-THz.2013.6665572
