Electron-hole dynamics in CdTe tetrapods.
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.
Malkmus
Stephan
S
BioMolekulare Optik, Department für Physik, Ludwig-Maximilians-Universität, Oettingenstr. 67, D-80538 München, Germany.
Kudera
Stefan
S
Manna
Liberato
L
Parak
Wolfgang J
WJ
Braun
Markus
M
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
D019187:Cadmium Compounds; D013691:Tellurium; C028337:cadmium telluride