title: Stability and signatures of biexcitons in carbon nanotubes.
abstract: The linear optical properties of semiconducting carbon nanotubes are dominated by quasi-one-dimensional excitons formed by single electron-hole pairs. Hence, the nonlinear response at high pump levels most likely leads to the formation of exciton complexes involving several electron-hole pairs. Such complexes would therefore play an important role in, e.g., lasing applications. We demonstrate here that the biexciton complex is surprisingly stable for nanotubes in a wide diameter range. Theoretical predictions for the signature of such states in pump-probe spectroscopy are presented.
authors.affiliation: Aalborg University, Department of Physics and Nanotechnology, Pontoppidanstraede 103, DK-9220 Aalborg Øst, Denmark. tgp@physics.aau.dk
authors.forename: Thomas G
authors.initials: TG
authors.lastname: Pedersen
authors.forename: Kjeld
authors.initials: K
authors.lastname: Pedersen
authors.forename: Horia D
authors.initials: HD
authors.lastname: Cornean
authors.forename: Pierre
authors.initials: P
authors.lastname: Duclos
mesh_terms: D003198:Computer Simulation; D008027:Light; D008956:Models, Chemical; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000528:radiation effects*; D010777:Photochemistry / Q000379:methods*; D011522:Protons; D012666:Semiconductors
chemical_list: D037742:Nanotubes, Carbon; D011522:Protons