Excitonic optical transitions characterized by Raman excitation profiles in single-walled carbon nanotubes
Financiación H2020 / H2020 FundsFinanciación FP7 / Fp7 Funds
Resumen: We examine the excitonic nature of the E33 optical transition of the individual free-standing index-identified (23, 7) single-walled carbon nanotube by means of the measurements of its radial-breathing-mode and G-mode Raman excitation profiles. We confirm that it is impossible to determine unambiguously the nature of its E33 optical transition (excitonic vs band to band) based only on the excitation profiles. Nevertheless, by combining Raman scattering, Rayleigh scattering, and optical absorption measurements on strictly the same individual (23, 7) single-walled carbon nanotube, we show that the absorption, Rayleigh spectra, and Raman excitation profiles of the longitudinal and transverse G modes are best fitted by considering the nature of the E33 transition as excitonic. The fit of the three sets of data gives close values of the transition energy E33 and damping parameter G33. This comparison shows that the fit of the Raman excitation profiles provides with good accuracy the energy and damping parameter of the excitonic optical transitions in single-walled carbon nanotubes.
Idioma: Inglés
DOI: 10.1103/PhysRevB.94.075430
Año: 2016
Publicado en: Physical Review B. Condensed Matter and Materials Physics 94, 7 (2016), 075430 [6 pp]
ISSN: 1098-0121

Factor impacto JCR: 3.836 (2016)
Categ. JCR: PHYSICS, CONDENSED MATTER rank: 18 / 67 = 0.269 (2016) - Q2 - T1
Factor impacto SCIMAGO: 2.339 - Electronic, Optical and Magnetic Materials (Q1) - Condensed Matter Physics (Q1)

Financiación: info:eu-repo/grantAgreement/EC/FP7/312483/EU/Enabling Science and Technology through European Electron Microscopy/ESTEEM 2
Financiación: info:eu-repo/grantAgreement/EC/H2020/642742/EU/Graphene-based nanomaterials for touchscreen technologies: Comprehension, Commerce and Communication/Enabling Excellence
Financiación: info:eu-repo/grantAgreement/ES/MINECO/FIS2013-46159-C3-3-P
Tipo y forma: Article (Published version)
Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)

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