Coherent phonon anisotropy in aligned single-walled carbon nanotubes

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

doi:10.1021/nl801200p

Coherent phonon anisotropy in aligned single-walled carbon nanotubes

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

SCI - Physics

Research output: Contribution to journal › Article › peer-review

53 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 language	English
Pages (from-to)	3102-3108
Number of pages	7
Journal	Nano Letters
Volume	8
Issue number	10
DOIs	https://doi.org/10.1021/nl801200p
Publication status	Published - 2008 Oct

ASJC Scopus subject areas

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

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10.1021/nl801200p

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author = "Keiko Kato and Kunie Ishioka and Masahiro Kitajima and Jie Tang and Riichiro Saito and Hrvoje Petek",

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AU - Kato, Keiko

AU - Ishioka, Kunie

AU - Kitajima, Masahiro

AU - Tang, Jie

AU - Saito, Riichiro

AU - Petek, Hrvoje

PY - 2008/10

Y1 - 2008/10

N2 - 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.

AB - 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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Coherent phonon anisotropy in aligned single-walled carbon nanotubes

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