Femtosecond spectroscopy of optical excitations in single-walled carbon nanotubes: Evidence for exciton-exciton annihilation

Ying Zhong Ma; Leonas Valkunas; Susan L. Dexheimer; Sergei M. Bachilo; Graham R. Fleming

doi:10.1103/PhysRevLett.94.157402

Femtosecond spectroscopy of optical excitations in single-walled carbon nanotubes: Evidence for exciton-exciton annihilation

Ying Zhong Ma, Leonas Valkunas, Susan L. Dexheimer, Sergei M. Bachilo, Graham R. Fleming

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Abstract

Frequency-resolved femtosecond transient absorption spectra and kinetics measured by optical excitation of the second and first electronic transitions of the (8, 3) single-walled carbon nanotube species reveal a unique mutual response between these transitions. Based on the analysis of the spectra, kinetics, and their distinct amplitude dependence on the pump intensity observed at these transitions, we conclude that these observations originate from both the excitonic origin of the spectrum and nonlinear exciton annihilation.

Original language	English
Article number	157402
Journal	Physical Review Letters
Volume	94
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevLett.94.157402
State	Published - Apr 22 2005
Externally published	Yes

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abstract = "Frequency-resolved femtosecond transient absorption spectra and kinetics measured by optical excitation of the second and first electronic transitions of the (8, 3) single-walled carbon nanotube species reveal a unique mutual response between these transitions. Based on the analysis of the spectra, kinetics, and their distinct amplitude dependence on the pump intensity observed at these transitions, we conclude that these observations originate from both the excitonic origin of the spectrum and nonlinear exciton annihilation.",

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AU - Bachilo, Sergei M.

AU - Fleming, Graham R.

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AB - Frequency-resolved femtosecond transient absorption spectra and kinetics measured by optical excitation of the second and first electronic transitions of the (8, 3) single-walled carbon nanotube species reveal a unique mutual response between these transitions. Based on the analysis of the spectra, kinetics, and their distinct amplitude dependence on the pump intensity observed at these transitions, we conclude that these observations originate from both the excitonic origin of the spectrum and nonlinear exciton annihilation.

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Femtosecond spectroscopy of optical excitations in single-walled carbon nanotubes: Evidence for exciton-exciton annihilation

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