Photoemission Electron Microscopy of a Plasmonic Silver Nanoparticle Trimer
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.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 1087267
- Report Number(s):
- PNNL-SA-84162; 40065; KC0301020
- Journal Information:
- Applied Physics A, Materials Science and Processing, 112(1):35-39, Journal Name: Applied Physics A, Materials Science and Processing, 112(1):35-39
- Country of Publication:
- United States
- Language:
- English
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