Surface-plasmon dispersion and multipole surface plasmons in Al(111)
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Abstract:
We have measured the collective electronic excitations of the Al(111) surface by means of angle-resolved high-resolution electron-energy-loss spectroscopy. Loss spectra reveal both the monopole and the multipole surface plasmons. The measured dispersion of the monopole surface plasmon is negative, as predicted by calculations of the dynamic response of the electron at the surface of a free-electron-like sample. The aluminum multipole surface plasmon, which was not detected in previous electron-energy-loss investigations, is clearly observed in present spectra.Keywords:
Localized surface plasmon
The generation of surface plasmon polaritons in periodic metallic structures is investigated theoretically and experimentally. The surface plasmon polaritons are excited with fs THz-pulses in different periodic metallic structures and propagation and resonance effects are observed.
Localized surface plasmon
Nanophotonics
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