Abstract
Unperturbed optical transition energies for isolated and individual SWNTs are measured using tunable resonant Raman scattering. The results suggest Coulomb interactions from exciton binding are comparable to bandgap renormalization, and are 1ev ≈ band gap. Previously measured optical transitions from nanotubes in surfactants are blue shifted 70-90 meV with respect to our measurements of nanotubes in air. The difference is attributed to different scaling exponents with ε for the exciton binding energy EXB and the bandgap renormalization EBGR, with EBGR>|EXB|, consistent with current theoretical understanding.
© 2005 Optical Society of America
PDF ArticleMore Like This
Hermeneglido N. Pedrosa, Libai Huang, Todd D. Krauss, Achim Hartschuh, Mathias Steiner, and Lukas Novotny
QTuB3 Quantum Electronics and Laser Science Conference (CLEO:FS) 2005
Matthew Y. Sfeir, Tobias Beetz, Feng Wang, Limin Huang, X. M. Henry Huang, J. Hone, Stephen P. O’Brien, J. A. Misewich, Yimei Zhu, Louis E. Brus, and Tony F. Heinz
QTuD6 Quantum Electronics and Laser Science Conference (CLEO:FS) 2006
Y. S. Lim, T. Joo, K. J. Yee, S. H. Baik, and D. Y. Jeong
JTh2A.93 CLEO: Applications and Technology (CLEO:A&T) 2012