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

doi:10.1103/PhysRevLett.94.047404

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^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

88 Citations (Scopus)

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 language	English
Article number	047404
Journal	Physical Review Letters
Volume	94
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevLett.94.047404
Publication status	Published - 2005 Feb 4
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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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.",

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AU - Maeda, A.

AU - Matsumoto, S.

AU - Kishida, H.

AU - Takenobu, T.

AU - Iwasa, Y.

AU - Shiraishi, M.

AU - Ata, M.

AU - Okamoto, H.

PY - 2005/2/4

Y1 - 2005/2/4

N2 - 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.

AB - 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.

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

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