Non-linear optical response and relaxation dynamics in double-walled carbon nanotubes

A. Nakamura, T. Tomikawa, M. Watanabe, Y. Hamanaka, Saito, H. Ago

    Research output: Contribution to journalArticlepeer-review

    7 Citations (Scopus)

    Abstract

    Relaxation dynamics of photoexcited carriers in individually suspended double-walled carbon nanotubes in solution have been investigated using femtosecond pump-probe spectroscopy. The average diameters of inner and outer tubes are 1.4 and 2.2 nm, respectively. The absorption spectrum reveals distinct band-to-band transitions in nanotubes with different diameters and chiralities. The differential absorption spectra measured by the pump-probe experiments show absorption bleaching and two-component decay behavior. The fast and slow components indicate carriers relaxation between the inner and outer tubes and non-radiative recombination of electrons and holes at the bottoms of the bands, respectively.

    Original languageEnglish
    Pages (from-to)8-12
    Number of pages5
    JournalJournal of Luminescence
    Volume119-120
    Issue numberSPEC. ISS.
    DOIs
    Publication statusPublished - Jul 1 2006

    All Science Journal Classification (ASJC) codes

    • Biophysics
    • Biochemistry
    • Chemistry(all)
    • Atomic and Molecular Physics, and Optics
    • Condensed Matter Physics

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