Luminescence Decay and the Absorption Cross-Section of Individual Single-Walled Carbon Nanotubes - Condensed Matter > Materials ScienceReportar como inadecuado




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Abstract: The absorption cross section of highly luminescent individual single-walledcarbon nanotubes is determined using time-resolved and cw luminescencespectroscopy. A mean value of 1x10-17 cm2 per carbon atom is obtained for 6,5tubes excited at their second optical transition, and corroborated by singletube photothermal absorption measurements. Biexponential luminescence decaysare systematically observed, with short and long lifetimes around 45 and 250ps. This behavior is attributed to the band edge exciton fine structure with adark level lying a few meV below a bright one.



Autor: Stephane Berciaud, Laurent Cognet, Brahim Lounis

Fuente: https://arxiv.org/







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