Surface plasmon excitation of Au and Ag in scanning probe energy loss spectroscopy

A Pulisciano, Sung Park, Richard Palmer

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

We explore the incident energy dependence of the electronic excitation spectra of Au and Ag films in scanning probe energy loss spectroscopy (SPELS) and also high resolution electron energy loss spectroscopy. We show that the spectra obtained in SPELS depend strongly on the incident electron beam energy. In the case of Au, interband transitions mask the surface plasmon unless the field emission voltage is reduced to similar to 100 V, whereas there is a clear surface plasmon peak above 300 V for Ag.
Original languageEnglish
Pages (from-to)213109
Number of pages1
JournalApplied Physics Letters
Volume93
Issue number21
DOIs
Publication statusPublished - 1 Nov 2008

Keywords

  • surface plasmons
  • silver
  • field emission
  • gold
  • metallic thin films
  • electron energy loss spectra

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