PT Journal
AU Kampfrath, T
   Perfetti, L
   von Volkmann, K
   Aguirre, CM
   Desjardins, P
   Martel, R
   Frischkorn, C
   Wolf, M
TI Optical response of single-wall carbon nanotube sheets in the far-infrared spectral range from 1 THz to 40 THz
SO Physica Status Solidi (B)
JI Phys. Stat. Sol. (B)
PY 2007
BP 3950
EP 3954
VL 244
IS 11
DI 10.1002/pssb.200776112
DE single wall; carbon nanotube; SWNT; SWCNT; CNT; detector; sensor; TDS
AB The optical properties of single-wall carbon nanotube sheets in the far-infrared have been investigated with THz time-domain spectroscopy. Over a wide frequency range from 1 THz to 40 THz, the complex dielectric function of the nanotube sample has been derived. Our data can be excellently reproduced by a Drude-Lorentz model function. The extracted fit parameters such as Lorentz resonance frequency and plasma frequency are consistent with values obtained by scanning tunneling techniques. We discuss the origin of both the Lorentz and Drude contribution in terms of direct and indirect optical transitions.
ER