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Lifetime of electronic excitations in metal nanoparticles

AuthorsQuijada, Marina; Díez Muiño, Ricardo ; Borisov, Andrei G.; Alonso, J. A. ; Echenique, Pedro M.
Issue DateMay-2010
PublisherInstitute of Physics Publishing
CitationNew Journal of Physics 12: 053023 (2010)
AbstractElectronic excitations in metal particles with sizes up to a few nanometers are shown to have a one-electron character when a laser pulse is applied off the plasmon resonance. The calculated lifetimes of these excitations are in the femtosecond timescale but their values are substantially different from those in bulk. This deviation can be explained from the large weight of the excitation wave function in the nanoparticle surface region, where dynamic screening is significantly reduced. The well-known quadratic dependence of the lifetime with the excitation energy in bulk breaks down in these finite-size systems.
Description9 páginas, 4 figuras.-- Trabajo presentado al "6th International Meeting on Photodynamics" celebrado en La Habana (Cuba) del 1 al 5 de febrero de 2010.
Publisher version (URL)http://dx.doi.org/10.1088/1367-2630/12/5/053023
Appears in Collections:(CFM) Artículos
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