Coherent Electronic and Phononic Oscillations in Single-Walled Carbon Nanotubes

Free induction decay of the coherent electronic transition and coherent phonon oscillations of the radial breathing mode in single-walled carbon nanotubes are simultaneously observed via direct resonant excitation of the lowest E 11 optical transition in the near-infrared region from 0.939 to 1.1 eV...

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Bibliographic Details
Published in:Nano letters 2012-02, Vol.12 (2), p.769-773
Main Authors: Eom, Intae, Park, Sohyun, Han, Hae-Seon, Yee, Ki-Ju, Baik, Sung-Hoon, Jeong, Do-Young, Joo, Taiha, Lim, Yong-Sik
Format: Article
Language:English
Subjects:
Chirality
Coherence
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electronics
Electrons
Exact sciences and technology
Excitation
Excitation spectra
Femtosecond pulses
Nanotubes
Nanotubes, Carbon - chemistry
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures
Optical transition
Oscillations
Oscillometry
Phonons
Physics
Single wall carbon nanotubes
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Summary:Free induction decay of the coherent electronic transition and coherent phonon oscillations of the radial breathing mode in single-walled carbon nanotubes are simultaneously observed via direct resonant excitation of the lowest E 11 optical transition in the near-infrared region from 0.939 to 1.1 eV. We show that coherent electronic oscillations corresponding to the detuning of the probe energy from resonance can be exploited for the chirality assignment of carbon nanotubes, together with the robust assignment of the coherent lattice vibrations resonantly excited by femtosecond pulses. Excitation spectra show a large number of pronounced peaks that map out chirality distributions in great detail.
ISSN:1530-6984
1530-6992
DOI:10.1021/nl203720n