Perturbation to the resonance modes by gold nanoparticles in a thin-film-based x-ray waveguide

D. R. Lee*, A. Hagman, Xuefa Li, S. Narayanan, Jin Wang, Kenneth R Shull

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

We demonstrate, for the first time, that the resonance modes in a thin-film-based x-ray waveguide are extremely sensitive to the electron density distribution in the thin film. The resonance modes can be effectively altered by diffusion of a gold nanoparticle submonolayer embedded in the waveguide. Such a perturbation can be observed with dramatic change in x-ray reflectivity and fluorescence data in the low-angle (<0.5°) resonance regime. Conversely, the quantitative analysis of the perturbation to the resonance modes, x-ray reflectivity, as well as the resonantly excited x-ray fluorescence from gold nanoparticles can be exploited to accurately determine the absolute gold distribution within the profile of the thin-film-based waveguide with subnanometer resolution.

Original languageEnglish (US)
Article number153101
JournalApplied Physics Letters
Volume88
Issue number15
DOIs
StatePublished - Apr 10 2006

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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