Abstract
We measured third-order nonlinear susceptibility (χ(3)) spectra in semiconducting single-walled carbon nanotubes (SWNTs) by the Z-scan method. |Im χ(3)| is remarkably enhanced under resonant excitation to the lowest interband transition, reaching 4.2 × 10 -6 esu. A comparison of the transient absorption changes evaluated by degenerate and nondegenerate pump-probe measurements suggests that the resonant enhancement of |Im χ(3)| is dominated by a coherent process rather than by incoherent one such as saturation of absorption.
Original language | English |
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Pages (from-to) | 177-182 |
Number of pages | 6 |
Journal | Journal of Physics: Conference Series |
Volume | 21 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2005 Jan 1 |
Externally published | Yes |
ASJC Scopus subject areas
- Physics and Astronomy(all)