Large optical nonlinearity of semiconducting single-walled carbon nanotubes under resonant excitations

A. Maeda, S. Matsumoto, H. Kishida, T. Takenobu, Y. Iwasa, M. Shiraishi, M. Ata, H. Okamoto

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Abstract

We measured third-order nonlinear susceptibility (x(3)) spectra in semiconducting single-walled carbon nanotubes (SWNTs) by the Z-scan method. |Imχ(3)| is remarkably enhanced under resonant excitation to the lowest interband transition, reaching 4.2 × 10-6 esu and 1.5 × 10-7 esu in SWNTs grown by the laser ablation and HiPco methods, respectively. A comparison of the transient absorption changes evaluated by degenerate and nondegenerate pump-probe measurements suggests that the resonant enhancement of |Imχ(3)| is dominated by a coherent process rather than by saturation of absorption.

Original languageEnglish
Article number047404
JournalPhysical Review Letters
Volume94
Issue number4
DOIs
Publication statusPublished - 2005 Feb 4
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Maeda, A., Matsumoto, S., Kishida, H., Takenobu, T., Iwasa, Y., Shiraishi, M., Ata, M., & Okamoto, H. (2005). Large optical nonlinearity of semiconducting single-walled carbon nanotubes under resonant excitations. Physical Review Letters, 94(4), [047404]. https://doi.org/10.1103/PhysRevLett.94.047404