Ultrafast exciton dephasing in semiconducting single-walled carbon nanotubes

Ying Zhong Ma, Matthew W. Graham, Graham R. Fleming, Alexander A. Green, Mark C Hersam

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

Femtosecond two-pulse degenerate four-wave mixing spectroscopy was applied to study the exciton dephasing in a broad range of excitation intensities and lattice temperatures. We find that both exciton-exciton and exciton-phonon scattering have profound effects on the dephasing process. The dominant phonon mode involved in the dephasing is identified as the out-of-plane, transverse optical mode with a frequency of 847cm-1. The extracted homogeneous linewidths at all measured temperatures are in excellent agreement with the results of a single-tube photoluminescence experiment.

Original languageEnglish
Article number217402
JournalPhysical Review Letters
Volume101
Issue number21
DOIs
Publication statusPublished - Nov 18 2008

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carbon nanotubes
excitons
four-wave mixing
tubes
photoluminescence
temperature
pulses
scattering
spectroscopy
excitation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Ultrafast exciton dephasing in semiconducting single-walled carbon nanotubes. / Ma, Ying Zhong; Graham, Matthew W.; Fleming, Graham R.; Green, Alexander A.; Hersam, Mark C.

In: Physical Review Letters, Vol. 101, No. 21, 217402, 18.11.2008.

Research output: Contribution to journalArticle

Ma, Ying Zhong ; Graham, Matthew W. ; Fleming, Graham R. ; Green, Alexander A. ; Hersam, Mark C. / Ultrafast exciton dephasing in semiconducting single-walled carbon nanotubes. In: Physical Review Letters. 2008 ; Vol. 101, No. 21.
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