Excitonic homogeneous broadening in single-wall carbon nanotubes

D. T. Nguyen (1) , C. Voisin (1) , Ph. Roussignol (1) , C. Roquelet (2) , J.-S Lauret (2) , Guillaume Cassabois (3)

1 LPA - Laboratoire Pierre Aigrain
2 LPQM - Laboratoire de Photonique Quantique et Moléculaire
3 L2C - Laboratoire Charles Coulomb

We present a review on the excitonic homogeneous linewidth, with an emphasis on original experiments by means of nonlinear spectral hole-burning. We address three specific aspects of the excitonic homogeneous broadening: (i) the variation of the homogeneous linewidth with the sonication energy, revealing the influence of extrinsic processes such as exciton-defect interactions, (ii) the collision-induced broadening due to exciton-exciton interactions, investigated by power-dependent measurements, and (iii) the phonon-induced dephasing due to exciton-phonon interactions, deduced from temperature-dependent experiments. We discuss the specific properties of one-dimensional excitons in carbon nanotubes in the context of the homogeneous broadening.

Domaines: Autre [cond-mat.other]

D. T. Nguyen, C. Voisin, Ph. Roussignol, C. Roquelet, J.-S Lauret, et al.. Excitonic homogeneous broadening in single-wall carbon nanotubes. Chemical Physics, 2013, 413, pp.102. ⟨10.1016/j.chemphys.2012.10.018⟩. ⟨hal-00797090⟩