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| Azevedo, Nuno Monteiro |
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Peppernick, Samuel J.
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Publications (5/5 displayed)
- 2013Photoemission Electron Microscopy of a Plasmonic Silver Nanoparticle Trimercitations
- 2013Plasmon-Induced Optical Field Enhancement studied by Correlated Scanning and Photoemission Electron Microscopycitations
- 2012Near-field focused photoemission from polystyrene microspheres studied with photoemission electron microscopycitations
- 2011Plasmonic enhancement of thin-film solar cells using gold-black coatingscitations
- 2011Plasmonic Field Enhancement of Individual Nanoparticles by Correlated Scanning and Photoemission Electron Microscopycitations
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article
Photoemission Electron Microscopy of a Plasmonic Silver Nanoparticle Trimer
Abstract
We present a combined experimental and theoretical study to investigate the spatial distribution of photoelectrons emitted from core-shell silver (Ag) nanoparticles. We use two-photon photoemission microscopy (2P-PEEM) to spatially resolve electron emission from a trimeric core-shell aggregate of triangular symmetry. 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 triangular core-shell structure. We demonstrate that the predicted FDTD near-field intensity distribution reproduces the 2P-PEEM photoemission pattern.