FAST MODE SURFACE-PLASMON DAMPING ON TUNNEL JUNCTION STRUCTURES

MP CONNOLLY*, AJL FERGUSON, P DAWSON, IR TAMM, DG WALMSLEY

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Using a prism-air gap-sample (Otto) configuration we have optically excited surface plasmon polaritons at the Ag-air interface of passive Al-Al oxide-Ag tunnel junction structures at wavelength 632.8 nm. It is found that the internal damping of this excitation is more than a factor of 2 greater for samples with a very thin (approximately 15 nm) Ag electrode than for samples with a thicker (approximately 40 nm) Ag electrode. This observation is explained by the fact that the fields of the surface plasmon polariton penetrate more substantially into the lossy Al base electrode when the Ag top electrode is very thin.

Original languageEnglish
Pages (from-to)225-231
Number of pages7
JournalSurface Science
Volume245
Issue number1-2
Publication statusPublished - Apr 1991

Keywords

  • COUPLED LIGHT-EMISSION
  • AG
  • RADIATION
  • ROUGHNESS
  • POLARITON
  • CONSTANTS
  • ALUMINUM
  • METALS

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