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. © 2013 IEEE.
Plasmonic excitations in Bi2Se3 topological insulator / DI PIETRO, PAOLA; ORTOLANI, MICHELE; LIMAJ, ODETA; A., Di Gaspare; GILIBERTI, VALERIA; GIORGIANNI, FLAVIO; M., Brahlek; N., Bansal; N., Koirala; S., Oh; CALVANI, Paolo; LUPI, Stefano. - ELETTRONICO. - (2013), pp. 1-2. (Intervento presentato al convegno 2013 38th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2013 tenutosi a Mainz; Germany nel 1 September 2013 through 6 September 2013) [10.1109/irmmw-thz.2013.6665572].