Ultrafast carrier dynamics in single-wall carbon nanotubes.
Time-resolved carrier dynamics in single-wall carbon nanotubes is investigated by means of two-color pump-probe experiments. The recombination dynamics is monitored by probing the transient photobleaching observed on the interband transitions of the semiconducting tubes. This dynamics takes place on a 1 ps time scale which is 1 order of magnitude slower than in graphite. Transient photoinduced absorption is observed for nonresonant probing and is interpreted as a global redshift of the pi-plasmon resonance. We show that the opening of the band gap in semiconducting carbon nanotubes determines the nonlinear response dynamics over the whole visible and near-infrared spectrum.
Lauret
J-S
JS
Laboratoire de Physique de la Matière Condensée de l'Ecole Normale Supérieure 24, rue Lhomond, 75231 Paris Cedex 05, France.
Voisin
C
C
Cassabois
G
G
Delalande
C
C
Roussignol
Ph
P
Jost
O
O
Capes
L
L