Direct measurement of the absolute absorption spectrum of individual semiconducting single-wall carbon nanotubes

The optical properties of single-wall carbon nanotubes are very promising for developing novel opto-electronic components and sensors with applications in many fields. Despite numerous studies performed using photoluminescence or Raman and Rayleigh scattering, knowledge of their optical response is...

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Bibliographic Details
Published in:Nature communications 2013-09, Vol.4 (1), p.2542-2542, Article 2542
Main Authors: Blancon, Jean-Christophe, Paillet, Matthieu, Tran, Huy Nam, Than, Xuan Tinh, Guebrou, Samuel Aberra, Ayari, Anthony, Miguel, Alfonso San, Phan, Ngoc-Minh, Zahab, Ahmed-Azmi, Sauvajol, Jean-Louis, Fatti, Natalia Del, Vallée, Fabrice
Format: Article
Language:English
Subjects:
639/301/119/1000
639/624/1107/527
639/925/357/73
Condensed Matter
Humanities and Social Sciences
Materials Science
multidisciplinary
Physics
Science
Science (multidisciplinary)
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Summary:The optical properties of single-wall carbon nanotubes are very promising for developing novel opto-electronic components and sensors with applications in many fields. Despite numerous studies performed using photoluminescence or Raman and Rayleigh scattering, knowledge of their optical response is still partial. Here we determine using spatial modulation spectroscopy, over a broad optical spectral range, the spectrum and amplitude of the absorption cross-section of individual semiconducting single-wall carbon nanotubes. These quantitative measurements permit determination of the oscillator strength of the different excitonic resonances and their dependencies on the excitonic transition and type of semiconducting nanotube. A non-resonant background is also identified and its cross-section comparable to the ideal graphene optical absorbance. Furthermore, investigation of the same single-wall nanotube either free standing or lying on a substrate shows large broadening of the excitonic resonances with increase of oscillator strength, as well as stark weakening of polarization-dependent antenna effects, due to nanotube–substrate interaction. A detailed knowledge of the properties of carbon nanotubes is required for their utilization in practical devices. Here the measurement of the absorption spectra of individual carbon nanotubes by Blancon et al. provides an important feedback to the modelling of their intrinsic properties.
ISSN:2041-1723
2041-1723
DOI:10.1038/ncomms3542