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Phonon-induced dephasing in single-wall carbon nanotubes

D. T. Nguyen, C. Voisin, Ph. Roussignol, C. Roquelet, J. S. Lauret, and G. Cassabois , Phys. Rev. B 84, 115463 (2011)

We report on original nonlinear spectral hole-burning experiments in ensembles of single-wall carbon nanotubes.We have measured the temperature dependence of the excitonic homogeneous linewidth from 5Kup to room temperature.We showthat the phonon-induced broadening in the weak coupling regime predominantly consists in pure dephasing.We present theoretical calculations of the exciton scattering rate due to phonon absorption within a one-dimensional framework for both excitons and phonons.We obtain a fair agreement with our experimental data andwe discuss the specific properties of the exciton-phonon coupling in single-wall carbon nanotubes.

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