Phonon-assisted exciton relaxation dynamics for a (6,5)-enriched DNA-wrapped single-walled carbon nanotube sample

S. G. Chou, M. F. DeCamp, J. Jiang, Ge G. Samsonidze, E. B. Barros, F. Plentz, A. Jorio, M. Zheng, G. B. Onoa, E. D. Semke, A. Tokmakoff, R. Saito, G. Dresselhaus, M. S. Dresselhaus

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27 Citations (Scopus)

Abstract

A series of nondegenerate pump-probe measurements were carried out on a DNA-wrapped single-walled carbon nanotube (SWNT) sample that is enriched with the (6,5) species. The pump pulse excites SWNTs at ∼1.567eV, which corresponds to an energy of two D-band phonons above the excitonic band edge of the (6,5) SWNT. The dynamics of different channels of exciton relaxation for the (6,5) SWNT is analyzed in terms of the decay in the time-resolved differential transmission spectra. By systematically varying the values of the probe energy, Eprobe, to be in and out of resonance with the minority (n,m) SWNT species in the sample at different pump fluence levels, an intermediate decay component associated with a hot phonon-absorption process is studied in detail. When the values of Eprobe were further tuned to off-resonance positions, photo-induced absorption processes could be investigated.

Original languageEnglish
Article number195415
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume72
Issue number19
DOIs
Publication statusPublished - 2005 Nov 15

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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