Elastic exciton-exciton scattering in photoexcited carbon nanotubes Auteur(s): Nguyen D. T., Voisin C., Roussignol Ph., Roquelet C., Lauret Jean‐sébastien, Cassabois G. (Article) Publié: Physical Review Letters, vol. 107 p.127401 (2011) Texte intégral en Openaccess : Ref HAL: hal-00623859_v1 DOI: 10.1103/PhysRevLett.107.127401 WoS: 000294929200008 Exporter : BibTex | endNote 38 Citations 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. |