Exciton binding energies in carbon nanotubes from two-photon photoluminescence

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dc.creatorMaultzsch, J.
dc.creatorPomraenke, R.
dc.creatorReich, S.
dc.creatorChang, E.
dc.creatorPrezzi, D.
dc.creatorRuini, A.
dc.creatorMolinari, E.
dc.creatorStrano, M. S.
dc.creatorThomsen, C.
dc.creatorLienau, C.
dc.date2005-05-06
dc.date.accessioned2026-07-07T06:24:06Z
dc.date.available2026-07-07T06:24:06Z
dc.descriptionOne- and two-photon luminescence excitation spectroscopy showed a series of distinct excitonic states in single-walled carbon nanotubes. The energy splitting between one- and two-photon-active exciton states of different wavefunction symmetry is the fingerprint of excitonic interactions in carbon nanotubes. We determine exciton binding energies of 0.3-0.4 eV for different nanotubes with diameters between 0.7 and 0.9 nm. Our results, which are supported by ab-initio calculations of the linear and non-linear optical spectra, prove that the elementary optical excitations of carbon nanotubes are strongly Coulomb-correlated, quasi-one dimensionally confined electron-hole pairs, stable even at room temperature. This alters our microscopic understanding of both the electronic structure and the Coulomb interactions in carbon nanotubes, and has direct impact on the optical and transport properties of novel nanotube devices.
dc.description5 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0505150
dc.identifierhttp://arxiv.org/abs/cond-mat/0505150
dc.identifierPhys. Rev. B 72, 241402(R) (2005)
dc.identifierdoi:10.1103/PhysRevB.72.241402
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/96428
dc.subjectMaterials Science
dc.titleExciton binding energies in carbon nanotubes from two-photon photoluminescence
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