TY - JOUR
KW - paper
AU - L Wirtz
AU - Olevano V
AU - A-G Marinopoulos
AU - Lucia Reining
AU - Angel Rubio
AB - We present a theoretical study of the optical absorption spectrum of small boron-nitride and carbon nanotubes using time-dependent density-functional theory and the random phase approximation. Both for C and BN tubes, the absorption of light polarized perpendicular to the tubeaxis is strongly suppressed due to local field effects. Since BN-tubes are wide band-gap insulators, they only absorb in the ultra-violet energy regime, independently of chirality and diameter. In comparison with the spectra of the single C and BN-sheets, the tubes display additional fine-structure which stems from the (quasi-) one-dimensionality of the tubes and sensitively depends on the chirality and tube diameter. This fine structure can provide additional information for the assignment of tube indices in high resolution optical absorption spectroscopy.
BT - Electronic Properties of Novel Materials: XVIIth International Winterschool, Ed. H. Kuzmany, J. Fink, M. Mehring and S. Roth, World (2003)., Conference proceedings
DO - 10.1063/1.1628060
N2 - We present a theoretical study of the optical absorption spectrum of small boron-nitride and carbon nanotubes using time-dependent density-functional theory and the random phase approximation. Both for C and BN tubes, the absorption of light polarized perpendicular to the tubeaxis is strongly suppressed due to local field effects. Since BN-tubes are wide band-gap insulators, they only absorb in the ultra-violet energy regime, independently of chirality and diameter. In comparison with the spectra of the single C and BN-sheets, the tubes display additional fine-structure which stems from the (quasi-) one-dimensionality of the tubes and sensitively depends on the chirality and tube diameter. This fine structure can provide additional information for the assignment of tube indices in high resolution optical absorption spectroscopy.
PY - 2003
SP - 406
EP - 410
T2 - Electronic Properties of Novel Materials: XVIIth International Winterschool, Ed. H. Kuzmany, J. Fink, M. Mehring and S. Roth, World (2003)., Conference proceedings
TI - Optical absorption in small BN and C nanotubes
UR - http://link.aip.org/link/?APCPCS/685/406/1
VL - 685
ER -