Abstract
Cathodoluminescence spectroscopy has been performed on silver nanoparticles in a scanning electron microscopy setup. Peaks appearing in the visible range for particles fabricated on silicon substrate are shown to arrive from excitation of out-of-plane eigenmodes by the electron beam. Monochromatic emission maps have been shown to resolve spatial field variation of resonant plasmon mode on length scale smaller than 25 nm. Finite-difference time-domain numerical simulations are performed for both the cases of light excitation and electron excitation. The results of radiative emission under electron excitation show an excellent agreement with experiments. A complete vectorial description of induced field is given, which complements the information obtained from experiments.
Original language | English |
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Pages (from-to) | 2965-2974 |
Number of pages | 10 |
Journal | ACS Nano |
Volume | 3 |
Issue number | 10 |
DOIs | |
Publication status | Published - 27 Oct 2009 |
Externally published | Yes |
Keywords
- Cathodoluminescence
- Eigenmodes
- Extinction
- Nanoparticles
- Plasmonics
ASJC Scopus subject areas
- General Materials Science
- General Engineering
- General Physics and Astronomy