Lefebvre, J. and Finnie, P. (2007) Polarized photoluminescence excitation spectroscopy of single-walled carbon nanotubes. PHYSICAL REVIEW LETTERS, 98 (16).
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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.
|Subjects:||Physical Science > Nano objects|
Physical Science > Photonics
|Deposited By:||Anuj Seth|
|Deposited On:||26 May 2009 15:39|
|Last Modified:||26 May 2009 15:39|
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