Malkmus, S; Kudera, S; Manna, L; Parak, WJ; Braun, M
Univ Munich, BioMol Opt, Dept Phys, D-80538 Munich, Germany; Univ Munich, Ctr Nanosci, Dept Phys, D-80538 Munich, Germany; Univ Lecce, Ist Super Univ Formaz Interdisciplinare, CNR INFM, Natl Nanotechnol Lab, I-73100 Lecce, Italy
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.
CDSE NANOCRYSTALS, QUANTUM DOTS, SEMICONDUCTOR NANOCRYSTALS, RELAXATION PATHWAYS, SHAPE CONTROL
ID: 677
Year: 2006
Type: Articolo in rivista
Creation: 2009-06-16 00:00:00.000
Last update: 2009-06-16 00:00:00.000
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CNR OAI-PMH: oai:it.cnr:prodotti:677