Publication: Polarized resonant Raman study of isolated single-wall carbon nanotubes: Symmetry selection rules, dipolar and multipolar antenna effects
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2002
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American Physical Society
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Jorio, 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.
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Abstract
We 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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