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Published on: October 9, 2012
Multielectron ionization of CdSe quantum dots in intense femtosecond ultraviolet light
Dong Hee Son1, Joshua S Wittenberg, A Paul Alivisatos
1Department of Chemistry, University of California, Berkeley California 94720, USA.
Abstract:
Multielectron ionization of colloidal CdSe quantum dots under intense femtosecond UV excitation has been studied. By directly probing the absorption from the ionized electron, quantitative measurements of the yield and dynamics of the ionization have been made as a function of excitation fluence and variations of size and potential structure of quantum dots. The results have been explained by an ionization mechanism involving resonant two-photon absorption.
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