title: Electron-hole dynamics in CdTe tetrapods.
abstract: We present transient absorption studies with femtosecond time resolution on the electron-hole dynamics in CdTe tetrapod nanostructures. Electron-hole pairs are generated by optical excitation in the visible spectral range, and an immediate bleach and induced absorption signal are observed. The relaxation dynamics to the lowest excitonic state is completed in about 6 ps. Experiments with polarized excitation pulses give information about the localization of the excited-state wave functions. The influence of the nanocrystal shape on the optical properties of CdTe nanoparticles is discussed.
authors.affiliation: BioMolekulare Optik, Department für Physik, Ludwig-Maximilians-Universität, Oettingenstr. 67, D-80538 München, Germany.
authors.forename: Stephan
authors.initials: S
authors.lastname: Malkmus
authors.forename: Stefan
authors.initials: S
authors.lastname: Kudera
authors.forename: Liberato
authors.initials: L
authors.lastname: Manna
authors.forename: Wolfgang J
authors.initials: WJ
authors.lastname: Parak
authors.forename: Markus
authors.initials: M
authors.lastname: Braun
mesh_terms: D016880:Anisotropy; D019187:Cadmium Compounds / Q000737:chemistry*; D002627:Chemistry, Physical / Q000379:methods*; D004583:Electrons; D046529:Microscopy, Electron, Transmission; D008956:Models, Chemical; D008968:Molecular Conformation; D053758:Nanoparticles / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry; D013053:Spectrophotometry; D055672:Static Electricity; D013691:Tellurium / Q000737:chemistry*; D013997:Time Factors
chemical_list: D019187:Cadmium Compounds; D013691:Tellurium; C028337:cadmium telluride