All-optical trion generation in single-walled carbon nanotubes

Silvia M. Santos, Bertrand Yuma, Stéphane Berciaud, Jonah Shaver, Mathieu Gallart, Pierre Gilliot, Laurent Cognet, Brahim Lounis

Research output: Contribution to journalArticlepeer-review

115 Scopus citations


We present evidence of all-optical trion generation and emission in pristine single-walled carbon nanotubes (SWCNTs). Luminescence spectra, recorded on individual SWCNTs over a large cw excitation intensity range, show trion emission peaks redshifted with respect to the bright exciton peak. Clear chirality dependence is observed for 22 separate SWCNT species, allowing for determination of electron-hole exchange interaction and trion binding energy contributions. Luminescence data together with ultrafast pump-probe experiments on chirality-sorted bulk samples suggest that exciton-exciton annihilation processes generate dissociated carriers that allow for trion creation upon a subsequent photon absorption event.

Original languageEnglish (US)
Article number187401
JournalPhysical review letters
Issue number18
StatePublished - Oct 27 2011
Externally publishedYes


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