title: Femtosecond microscopy of surface plasmon polariton wave packet evolution at the silver/vacuum interface.
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.
authors.affiliation: Department of Physics and Astronomy and Petersen Institute for NanoScience and Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA.
authors.forename: Atsushi
authors.initials: A
authors.lastname: Kubo
authors.forename: Niko
authors.initials: N
authors.lastname: Pontius
authors.forename: Hrvoje
authors.initials: H
authors.lastname: Petek