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Updated: Jul 1, 2026

Resonance Raman Spectroscopy of Extreme Nanowires and Other 1D Systems
Published on: April 28, 2016
Coherent phonon anisotropy in aligned single-walled carbon nanotubes
Keiko Kato1, Kunie Ishioka, Masahiro Kitajima
1Advanced Nano Characterization Center, National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan.
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.
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