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Article Dans Une Revue Physical Review Letters Année : 2011

Elastic exciton-exciton scattering in photoexcited carbon nanotubes

Résumé

We report on original nonlinear spectral hole-burning experiments in single wall carbon nanotubes that bring evidence of pure dephasing induced by exciton-exciton scattering. We show that the collision-induced broadening in carbon nanotubes is controlled by exciton-exciton scattering as for Wannier excitons in inorganic semiconductors, while the population relaxation is driven by exciton-exciton annihilation as for Frenkel excitons in organic materials. We demonstrate that this singular behavior originates from the intrinsic one-dimensionality of excitons in carbon nanotubes, which display unique hybrid features of organic and inorganic systems.
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hal-00623859 , version 1 (19-09-2011)

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D. T. Nguyen, C. Voisin, Ph. Roussignol, C. Roquelet, Jean‐sébastien Lauret, et al.. Elastic exciton-exciton scattering in photoexcited carbon nanotubes. Physical Review Letters, 2011, 107 (12), pp.127401. ⟨10.1103/PhysRevLett.107.127401⟩. ⟨hal-00623859⟩
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