Coherent phonon anisotropy in aligned single-walled carbon nanotubes

Keiko Kato, Kunie Ishioka, Masahiro Kitajima, Jie Tang, Riichiro Saito, Hrvoje Petek

Research output: Contribution to journalArticlepeer-review

51 Citations (Scopus)

Abstract

By time-resolved reflectivity measurements with sub-10 fs laser pulses at 395 nm, the coherent phonons of aligned bundles of single-walled carbon nanotubes are observed for various polarization directions of the pump and probe pulses. In the isotropic reflectivity measurement, we observe the radial breathing modes, G, and even D modes, while in the anisotropic reflectivity mode, only the G mode appears. A complex polarization dependence of the G band phonon amplitude in the isotropic reflectivity is explained by the superposition of G band phonons with different symmetries.

Original languageEnglish
Pages (from-to)3102-3108
Number of pages7
JournalNano Letters
Volume8
Issue number10
DOIs
Publication statusPublished - 2008 Oct

ASJC Scopus subject areas

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

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