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Updated: Jan 7, 2026
Optical Trapping of Plasmonic Nanoparticles for In Situ Surface-Enhanced Raman Spectroscopy Characterizations
Published on: June 23, 2022
Femtosecond microscopy of surface plasmon polariton wave packet evolution at the silver/vacuum interface
Atsushi Kubo1, Niko Pontius, Hrvoje Petek
1Department 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.
