Polarized resonant Raman study of isolated single-wall carbon nanotubes: Symmetry selection rules, dipolar and multipolar antenna effects
Souza Filho, A. G.
Brar, V. W.
Swan, A. K.
Ünlü, M. S.
Goldberg, B. B.
Hafner, J. H.
Lieber, C. M.
Dresselhaus, M. S.
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CitationJorio, A., A. G. Souza Filho, V. W. Brar, A. K. Swan, M. S. Ünlü, B. B. Goldberg, A. Righi, et al. 2002. “Polarized Resonant Raman Study of Isolated Single-Wall Carbon Nanotubes: Symmetry Selection Rules, Dipolar and Multipolar Antenna Effects.” Physical Review B 65 (12). https://doi.org/10.1103/physrevb.65.121402.
AbstractWe studied the polarization dependence of the resonance Raman spectra for several different isolated single-wall carbon nanotubes (SWNTs). One isolated SWNT acts as a dipolar antenna, polarized along the tube axis. For light polarized parallel to the tube axis, the strong resonance-effect breaks the symmetry-selection rules, and symmetry-forbidden modes appear in the Raman spectrum. When the light is not polarized parallel to the tube axis, G-band mode symmetries can be identified. Unusual G-mode intensity behavior is observed when the Raman signal is obtained from more than one SWNT, suggesting a complex multipolar antenna pattern.
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