Answers are grounded in this paper and cite their sources.
The polarized photoluminescence excitation spectra of twenty-five single-walled carbon nanotube species are reported. For light polarized along the nanotube axis, the main absorption resonance at E22 shows sidebands attributed to phonon assisted absorption. Sidebands to E11 have a diameter dependent energy and are assigned to excited excitonic states. Along with longitudinal excitations, several transverse excitations are identified. The transverse E12 resonance has a specific family pattern with energy close to E22. Comparison with theory provides an estimate of the strength of the Coulomb interaction.
No takes yet. Share an insight, caveat, or question.
Lefebvre et al. (2007) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: