TITLE

Coherent monochromatic phonons in highly purified semiconducting single-wall carbon nanotubes

AUTHOR(S)
Honda, Yuki; Maret, Elizabeth; Hirano, Atsushi; Tanaka, Takeshi; Makino, Kotaro; Hase, Muneaki
PUB. DATE
June 2013
SOURCE
Applied Physics Letters;6/3/2013, Vol. 102 Issue 22, p222109
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We have used a femtosecond pump-probe impulsive Raman technique to explore the polarization dependence of coherent optical phonons in highly purified and aligned semiconducting single-wall carbon nanotubes (SWCNTs). Coherent phonon spectra for the radial breathing modes (RBMs) exhibit a different monochromatic frequency between the film and solution samples, indicating the presence of differing exciton excitation processes. By varying the polarization of the incident pump beam on the aligned SWCNT film, we found that the anisotropy of the coherent RBM excitation depends on the laser wavelength, which we consider to be associated with the resonant and off-resonant behavior of RBM excitation.
ACCESSION #
88041279

 

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