Multielectron ionization of CdSe quantum dots in intense femtosecond ultraviolet light

Journal Article · Fri Mar 26 00:00:00 EST 2004 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.92.127406· OSTI ID:20563685

Son, D H; Wittenberg, Joshua S; Alivisatos, A Paul ^[1]

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1. Department of Chemistry, University of California, Berkeley California 94720 (United States)

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.

• OSTI ID: 20563685
• Journal Information: Physical Review Letters, Vol. 92, Issue 12; Other Information: DOI: 10.1103/PhysRevLett.92.127406; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION
CADMIUM SELENIDES
CRYSTALS
ELECTRONS
EXCITATION
IONIZATION
MULTI-PHOTON PROCESSES
PHOTONS
QUANTUM DOTS
TIME RESOLUTION
VARIATIONS
VISIBLE RADIATION