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Nano Lett. 2007 Feb;7(2):470-5.

Femtosecond microscopy of surface plasmon polariton wave packet evolution at the silver/vacuum interface.

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1
Department of Physics and Astronomy and Petersen Institute for NanoScience and Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA.

Abstract

A movie of the dispersive and dissipative propagation of surface plasmon polariton (SPP) wave packets at a silver/vacuum interface is recorded by the interferometric time-resolved photoemission electron microscopy with 60 nm spatial resolution and 330 as frame interval. The evolution of SPP wave packets is imaged through a two-path interference created by a pair of 10 fs phase correlated pump-probe light pulses at 400 nm. The wave packet evolution is simulated using the complex dielectric function of silver.

PMID:
17298016
DOI:
10.1021/nl0627846
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