Coherent lattice vibrations in single-walled carbon nanotubes

Yong Sik Lim, Ki Ju Yee, Ji Hee Kim, Erik H. Hároz, Jonah Shaver, Junichiro Kono, Stephen K. Doorn, Robert H. Hauge, Richard E. Smalley

Research output: Contribution to journalArticlepeer-review

110 Scopus citations

Abstract

We have generated and detected coherent lattice vibrations in single-walled carbon nanotubes corresponding to the radial breathing mode (RBM) using ultrashort laser pulses. Because the band gap is a function of diameter, these RBM-induced diameter oscillations cause ultrafast band gap oscillations, thereby modulating the interband excitonic resonances at the phonon frequencies (3-9 THz). Excitation spectra show a large number of pronounced peaks, allowing the determination of the chiralities present in particular samples and relative population differences of particular chiralities between samples.

Original languageEnglish (US)
Pages (from-to)2696-2700
Number of pages5
JournalNano letters
Volume6
Issue number12
DOIs
StatePublished - Dec 2006

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