Spectral and angular distribution of Rayleigh scattering from plasmon-coupled nanohole chains

Yury Alaverdyan, Eva Maria Hempe, A. Nick Vamivakas, E. Haibo, Stefan A. Maier, Mete Atatüre

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We experimentally investigate the optical properties of nanohole chains in 20 nm gold films by measuring the far-field radiation patterns and scattering spectra using both white light and single-frequency laser excitations. We observe intensity enhancement in the frequency spectrum originating from resonantly coupled nanohole excitations via thin film surface plasmon polaritons. However, the angular distribution of the far-field pattern is identical to that of a chain of coherently radiating point dipoles both on and off the resonance frequency. We highlight a potential of the k -space imaging technique for studying far-field properties of ordered nanoscale structures.

Original languageEnglish
Article number021112
Number of pages3
JournalApplied Physics Letters
Issue number2
Publication statusPublished - 12 Jan 2009
Externally publishedYes

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