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Probing the ultrafast dynamics of excitons in single semiconducting carbon nanotubes

Author

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  • Konrad Birkmeier

    (LMU Munich
    TOPTICA Photonics AG)

  • Tobias Hertel

    (Institute of Physical and Theoretical Chemistry, Julius-Maximilian University Würzburg)

  • Achim Hartschuh

    (LMU Munich)

Abstract

Excitonic states govern the optical spectra of low-dimensional semiconductor nanomaterials and their dynamics are key for a wide range of applications, such as in solar energy harvesting and lighting. Semiconducting single-walled carbon nanotubes emerged as particularly rich model systems for one-dimensional nanomaterials and as such have been investigated intensively in the past. The exciton decay dynamics in nanotubes has been studied mainly by transient absorption and time-resolved photoluminescence spectroscopy. Since different transitions are monitored with these two techniques, developing a comprehensive model to reconcile different data sets, however, turned out to be a challenge and remarkably, a uniform description seems to remain elusive. In this work, we investigate the exciton decay dynamics in single carbon nanotubes using transient interferometric scattering and time-resolved photoluminescence microscopy with few-exciton detection sensitivity and formulate a unified microscopic model by combining unimolecular exciton decay and ultrafast exciton-exciton annihilation on a time-scale down to 200 fs.

Suggested Citation

  • Konrad Birkmeier & Tobias Hertel & Achim Hartschuh, 2022. "Probing the ultrafast dynamics of excitons in single semiconducting carbon nanotubes," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-33941-2
    DOI: 10.1038/s41467-022-33941-2
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    References listed on IDEAS

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    1. Randy D. Mehlenbacher & Thomas J. McDonough & Maksim Grechko & Meng-Yin Wu & Michael S. Arnold & Martin T. Zanni, 2015. "Energy transfer pathways in semiconducting carbon nanotubes revealed using two-dimensional white-light spectroscopy," Nature Communications, Nature, vol. 6(1), pages 1-7, November.
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