Phys. Rev. Lett. 92, 127406 (2004) [4 pages]Multielectron Ionization of CdSe Quantum Dots in Intense Femtosecond Ultraviolet Light |
Dong Hee Son, Joshua S. Wittenberg, and A. Paul Alivisatos *
Department of Chemistry, University of California, Berkeley California 94720, USA
Material Science Division, Lawrence Berkeley National Laboratory, Berkeley California 94720, USA
Received 3 November 2003; published 26 March 2004
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.
©2004 The American Physical Society
URL: http://link.aps.org/abstract/PRL/v92/e127406
DOI: 10.1103/PhysRevLett.92.127406
PACS: 78.67.Hc, 32.80.Rm, 68.65.Hb
* Electronic address: alivis@uclink4.berkeley.edu
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