Photoemission Electron Microscopy of a Plasmonic Silver Nanoparticle Trimer

In order to exploit the surface plasmon mediated growth process described above, a fundamental understanding of the plasmonic properties of the nanostructured substrates will be required.  We present a combined experimental and theoretical study to investigate the spatial distribution of photoelectrons emitted from silver-coated polystyrene nanoparticles. We use two-photon photoemission electron microscopy (2P-PEEM) to image electron emission from a silver-capped aggregate trimer. Finite difference time domain (FDTD) simulations are performed to model the intensity distributions of the electromagnetic near- fields resulting from femtosecond (fs) laser excitation of localized surface plasmon oscillations in the trimer structure. We demonstrate that the predicted FDTD near-field intensity distribution reproduces the 2P-PEEM photoemission pattern.

Doc.: http://link.springer.com/article/10.1007/s00339-012-7316-5/fulltext.html.

Samuel J Peppernick, A. G. (2012). Photoemission electron microscopy of a plasmonic nanoparticle trimer. Applied Physics A.