Optical phonon lifetimes in single-walled carbon nanotubes by time-resolved Raman scattering

Kwangu Kang, Taner Ozel, David G. Cahill, Moonsub Shim

Research output: Contribution to journalArticle

Abstract

The lifetimes of optical phonons (OPs) in single-walled carbon nanotubes are determined by time-resolved incoherent anti-Stokes Raman scattering using a subpicosecond pump-probe method. Lifetimes in semiconducting and metallic nanotubes at room temperature are similar, 1.2 and 0.9 ps, respectively. The OP lifetimes decrease with increasing temperature, approximately scaling as ∼1/T, consistent with anharmonic processes being the dominant decay mechanism for both semiconducting and metallic nanotubes.

Original languageEnglish (US)
Pages (from-to)4642-4647
Number of pages6
JournalNano letters
Volume8
Issue number12
DOIs
StatePublished - Dec 1 2008

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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