Thickness-gradient dependent Raman enhancement in silver island films

T. W.H. Oates, S. Noda

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

We show evidence of a dependence of the enhancement of the Raman scattering cross section on the length of the gradient in graded silver island films. A factor-of-three increase in the Raman signal is observed for gradients with length of the order of 0.5 mm when compared to gradients of the order of 9 mm. Scanning electron microscopy reveals the nanostructure of the two films to be statistically similar. We attribute the observation to differences in plasmon hybridization in the gradients arising from long range structural differences.

Original languageEnglish
Article number053106
JournalApplied Physics Letters
Volume94
Issue number5
DOIs
Publication statusPublished - 2009 Feb 16

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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