Enhanced radiative emission rate and quantum efficiency in coupled silicon nanocrystal-nanostructured gold emitters

Julie S. Biteen, Domenico Pacifici, Nathan S. Lewis, Harry A. Atwater

Research output: Contribution to journalArticle

211 Citations (Scopus)

Abstract

We report local-field-enhanced light emission from silicon nanocrystals close to a film of nanoporous gold. We resolve photoluminescence as the gold-Si nanocrystal separation distance is varied between 0 and 20 nm and observe a fourfold luminescence intensity enhancement concomitant with increases in the coupled silicon nanocrystal/nanoporous gold absorbance cross section and radiative decay rate. A detailed analysis of the luminescence data indicated a local-field-enhanced quantum efficiency of 58% for the Si nanocrystals coupled to the nanoporous gold layer.

Original languageEnglish
Pages (from-to)1768-1773
Number of pages6
JournalNano letters
Volume5
Issue number9
DOIs
Publication statusPublished - Sep 1 2005

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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