title: Polarized photoluminescence excitation spectroscopy of single-walled carbon nanotubes.
abstract: 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.
authors.affiliation: Institute for Microstructural Sciences, National Research Council, Montreal Road, Ottawa, Ontario, K1A OR6, Canada.
authors.forename: J
authors.initials: J
authors.lastname: Lefebvre
authors.forename: P
authors.initials: P
authors.lastname: Finnie