Ultrafast carrier dynamics in single-walled carbon nanotubes probed by femtosecond spectroscopy.

Abstract

Ultrafast carrier dynamics in individual semiconducting single-walled carbon nanotubes was studied by femtosecond transient absorption and fluorescence measurements. After photoexcitation of the second van Hove singularity of a specific tube structure, the relaxation of electrons and holes to the fundamental band edge occurs to within 100 fs. The fluorescence decay from this band is dependent on the excitation density and can be rationalized by exciton annihilation theory. In contrast to fluorescence, the transient absorption has a distinctly different time and intensity dependence for different tube structures, suggesting a branching to emissive and trap states following photoexcitation.

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Cite this paper

@article{Ma2004UltrafastCD, title={Ultrafast carrier dynamics in single-walled carbon nanotubes probed by femtosecond spectroscopy.}, author={Ying-Zhong Ma and Jens Stenger and Jorg Zimmermann and Sergei M Bachilo and Richard E . Smalley and R Bruce Weisman and Graham R Fleming}, journal={The Journal of chemical physics}, year={2004}, volume={120 7}, pages={3368-73} }