Berlin 2012 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
HL: Fachverband Halbleiterphysik
HL 11: Carbon: Nanotubes, Diamond and Silicon Carbid
HL 11.7: Vortrag
Montag, 26. März 2012, 13:15–13:30, EW 203
Two-color pump-probe study of single-walled carbon nanotubes — •Olga A. Dyatlova1, Christopher Koehler2, Ermin Malic2, Jordi Gomis-Bresco1, Janina Maultzsch3, Andrey Tsagan-Mandzhiev1, Tobias Watermann2, Andreas Knorr2, and Ulrike Woggon1 — 1Institut fuer Optik und Atomare Physik, Technische Universitaet Berlin, 10623 Berlin, Germany — 2Institut fuer Theoretische Physik, Technische Universitaet Berlin, 10623 Berlin, Germany — 3Institut fuer Festkoerperphysik, Technische Universitaet Berlin, 10623 Berlin, Germany
Due to their remarkable properties carbon nanotubes (CNT) have big application potential which is already implemented in some real devices and products. A better understanding of the ultrafast relaxation dynamics of optically excited carriers in single walled carbon nanotubes is of crucial importance for the realization of their application potential. In this work, we perform two-color pump-probe experiments to determine the decay behavior of (8,7), (10,2), (11,3), and (12,1) nanotubes. We find the relaxation dynamics to be characterized by three decay times in ps, tens of ps and few hundreds of ps ranges. Our results are modeled within a microscopic approach based on the density matrix formalism. Our calculations reveal that the component in the range of 5-10 ps is due to the intraband carrier-phonon scattering.