Excitons in carbon nanotubes

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autor(en): Maultzsch J
Zeitschrift: physica status solidi (b)
Verlag: WILEY-V C H VERLAG GMBH
Jahr der Veröffentlichung: 2006
Band: 243
Heftnummer: 13
Seitenbereich: 3204-3208
ISSN: 0370-1972
eISSN: 1521-3951


Abstract


We present two-photon excitation luminescence experiments on carbon nanotubes which show the excitonic origin of the optical excitations. The two-photon allowed exciton state, which has even parity under rotation about the U-axis, is roughly 300 meV above the one-photon active, odd-parity state. This indicates exciton binding energies on the order of 400 meV for nanotubes with diameters around 8 A. Ab-initio calculations of the exciton wavefunctions and energies are in good agreement with our experimental results, confirming the predictions on the symmetry of the exciton states. (c) 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.



FAU-Autoren / FAU-Herausgeber

Maultzsch, Janina Prof. Dr.
Lehrstuhl für Experimentalphysik

Zuletzt aktualisiert 2018-19-09 um 15:53