Advances in single nanotube spectroscopy: Raman spectra from cross-polarized light and chirality dependence of Raman frequencies

• Published in: Carbon (New York) Vol. 42; no. 5; pp. 1067 - 1069
• Main Authors: Jorio, A., Pimenta, M.A., Fantini, C., Souza, M., Souza Filho, A.G., Samsonidze, Ge.G., Dresselhaus, G., Dresselhaus, M.S., Saito, R.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Oxford Elsevier Ltd 2004; Elsevier Science
• Subjects: A. Carbon nanotubes; C. Raman spectroscopy; Cross-disciplinary physics: materials science; rheology; D. Optical properties, Phonons; Exact sciences and technology; Fullerenes and related materials; diamonds, graphite; Materials science; Physics; Specific materials; C. Raman spectroscopy; D. Optical properties, Phonons; A. Carbon nanotubes; Frequency; Raman spectroscopy; Chirality; Polarized light; Nanotubes
• ISSN: 0008-6223; 1873-3891
• DOI: 10.1016/j.carbon.2003.12.061

This work discusses new results obtained from analysis of Raman signal from isolated single wall carbon nanotubes. (1) Study of tangential (G band) modes frequency dependence on tube diameter and lineshape dependence on scattering polarization geometry shows clear observation of symmetry selection rules at the single nanotube level. Observation of
E
2 phonon modes indicates Raman spectra coming from cross-polarized light, i.e. from
E
μ
v→
E
μ±1
c electronic transitions. (2) Study of the disorder induced (D) band and other small intensity features show strong dependence of Raman frequencies of nanotube chiral angle.