Harutyunyan, Hayk and Gokus, Tobias and Green, Alexander A. and Hersam, Mark C. and Allegrini, Maria and Hartschuh, Achim (2009) Defect Induced Photoluminescence from Dark Excitonic States in Individual Single-Walled Carbon Nanotubes. Nano letters, 9 . pp. 2010-2014. ISSN 1530-6992
Full text not available from this repository.Abstract
SUMMARY We show that new low-energy photoluminescence (PL) bands can be created in semiconducting single-walled carbon nanotubes by intense pulsed excitation. The new bands are attributed to PL from different nominally dark excitons that are "brightened" due to defect-induced mixing of states with different parity and/or spin. Time-resolved PL studies on single nanotubes reveal a significant reduction of the bright exciton lifetime upon brightening of the dark excitons. The lowest energy dark state has longer lifetimes and is not in thermal equilibrium with the bright state.
| Item Type: | Article |
|---|---|
| Additional Information: | Imported from arXiv |
| Subjects: | Area02 - Scienze fisiche > FIS/03 - Fisica della materia |
| Divisions: | Dipartimenti (from 2013) > DIPARTIMENTO DI FISICA |
| Depositing User: | dott.ssa Sandra Faita |
| Date Deposited: | 07 Aug 2013 13:10 |
| Last Modified: | 07 Aug 2013 13:10 |
| URI: | http://eprints.adm.unipi.it/id/eprint/1467 |
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