AVS 54th International Symposium | |
Plasmonics Topical Conference | Monday Sessions |
Session PL-MoA |
Session: | Plasmon Dynamics and Magnetoplasmonics |
Presenter: | H. Petek, University of Pittsburgh |
Correspondent: | Click to Email |
We study the dynamics of localized surface plasmons and propagating surface plasmon polaritons in nanostructured Ag films on femtosecond temporal and nanometer spatial scale by means of interferometric time-resolved two-photon photoelectron emission microscopy (ITR-PEEM). Identical, phase correlated pump-probe pulses excite two-photon photoemission mediated by surface plasmon excitation in silver films; the resulting electron emission is imaged with electron optics. The combination of laser excitation an electron imaging provides <10 fs temporal and 50 nm spatial resolution. We record movies of surface plasmon propagation, dispersion, dephasing, interference and focusing in nanolithographically patterned metal films. The ITR-PEEM method provides a revolutionary advance in ultrafast electron microscopy for visualizing and controlling electromagnetic fields and ultrafast processes on the nano-femto scale.1,2.
1A. Kubo, K. Onda, H. Petek, Z. Sun, Y.-S. Jung, and H.-K. Kim, Nano Letters 5, 1123 (2005).
2A. Kubo, N. Pontius, and H. Petek, Nano Lett. 7, 470 (2007).