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Soavi G, Grupp A, Budweg A, et al. Below-gap excitation of semiconducting single-wall carbon nanotubes. Nanoscale. 2015;7(43):18337-42doi: 10.1039/c5nr05218a.
Soavi, G., Grupp, A., Budweg, A., Scotognella, F., Hefner, T., Hertel, T., Lanzani, G., Leitenstorfer, A., Cerullo, G., & Brida, D. (2015). Below-gap excitation of semiconducting single-wall carbon nanotubes. Nanoscale, 7(43), 18337-42. https://doi.org/10.1039/c5nr05218a
Soavi, G, et al. "Below-gap excitation of semiconducting single-wall carbon nanotubes." Nanoscale vol. 7,43 (2015): 18337-42. doi: https://doi.org/10.1039/c5nr05218a
Soavi G, Grupp A, Budweg A, Scotognella F, Hefner T, Hertel T, Lanzani G, Leitenstorfer A, Cerullo G, Brida D. Below-gap excitation of semiconducting single-wall carbon nanotubes. Nanoscale. 2015 Nov 21;7(43):18337-42. doi: 10.1039/c5nr05218a. PMID: 26488340.
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Nanoscale. 2015 Nov 21;7(43):18337-42. doi: 10.1039/c5nr05218a.

Below-gap excitation of semiconducting single-wall carbon nanotubes.

Nanoscale

G Soavi, A Grupp, A Budweg, F Scotognella, T Hefner, T Hertel, G Lanzani, A Leitenstorfer, G Cerullo, D Brida

Affiliations

  1. Department of Physics and Center for Applied Photonics, University of Konstanz, D-78457 Konstanz, Germany. [email protected] [email protected] and Dipartimento di Fisica, Politecnico di Milano, Piazza L. da Vinci 32, 20133 Milano, Italy.
  2. Department of Physics and Center for Applied Photonics, University of Konstanz, D-78457 Konstanz, Germany. [email protected] [email protected].
  3. Dipartimento di Fisica, Politecnico di Milano, Piazza L. da Vinci 32, 20133 Milano, Italy and IFN-CNR, Piazza L. da Vinci, 32, 20133 Milano, Italy.
  4. Inst. for Physical and Theoretical Chemistry Dept. of Chemistry and Pharmacy, University of Würzburg, Würzburg 97074, Germany.
  5. Center for Nano Science and Technology@PoliMi, Istituto Italiano di Tecnologia, Via Giovanni Pascoli, 70/3, 20133 Milano, Italy.

PMID: 26488340 DOI: 10.1039/c5nr05218a

Abstract

We investigate the optoelectronic properties of the semiconducting (6,5) species of single-walled carbon nanotubes by measuring ultrafast transient transmission changes with 20 fs time resolution. We demonstrate that photons with energy below the lowest exciton resonance efficiently lead to linear excitation of electronic states. This finding challenges the established picture of a vanishing optical absorption below the fundamental excitonic resonance. Our result points towards below-gap electronic states as an intrinsic property of semiconducting nanotubes.

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