Coherent phonon anisotropy in aligned single-walled carbon nanotubes.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 18788825.
- Also identified by DOI 10.1021/nl801200p.
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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.
Medical subject headings
- Anisotropy
- Nanotubes, Carbon