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Deutsche Physikalische Gessellschaft IOP Institute of Physics

Interface decay channel of particle surface plasmon resonance

Anatoliy Pinchuk1,2 and Uwe Kreibig1

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Surface plasmon polariton resonance in metallic clusters embedded in a matrix is broadened due to the interface decay channel of the plasmon lifetime. This non-classical broadening effect is caused by adsorbate-induced local density of states near the Fermi level of the cluster. We study theoretically the broadening effect for realistic small noble clusters extending Persson's theory for adsorbate-induced damping of the plasmon resonance by taking into account the interband transitions in the dielectric function of the cluster. The broadening of the surface plasmon resonance caused by the interface decay channel is significantly influenced by the interband transitions in the metallic cluster.


PACS

73.22.Lp Collective excitations

77.22.Ch Permittivity (dielectric function)

Subjects

Condensed matter: electrical, magnetic and optical

Nanoscale science and low-D systems

Dates

Issue 1 (November 2003)

Received 30 July 2003

Published 13 November 2003



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