Efficient unidirectional ridge excitation of surface plasmons

Publication: Research - peer-reviewJournal article – Annual report year: 2009

Without internal affiliation

  • Author: Radko, I. P

    University of Southern Denmark, Denmark

  • Author: Bozhevolnyi, Sergey I.

    University of Southern Denmark

  • Author: Brucoli, G.

    Universidad de Zaragoza, Spain

  • Author: Martin-Moreno, L.

    Universidad de Zaragoza, Spain

  • Author: Garcia-Vidal, F. J.

    Universidad Autónoma de Madrid, Spain

  • Author: Boltasseva, Alexandra

    Purdue University

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Using leakage-radiation microscopy, we characterize the efficiency of unidirectional surface-plasmon excitation with periodic (800 nm) arrays of 130-nm-high and 330-nm-wide gold ridges on a thin gold film illuminated with a focused (5-mu m-wide) laser beam. We demonstrate that, at the resonant wavelength of 816 nm, the excitation efficiency of > 0.4 can be obtained with >= 5 ridges by adjusting the beam position. Conducting numerical simulations, we account for the experimental results and calculate the electric-field enhancement achieved near the gold surface. (C) 2009 Optical Society of America
Original languageEnglish
JournalOptics Express
Issue number9
Pages (from-to)7228-7232
StatePublished - 2009
Externally publishedYes
CitationsWeb of Science® Times Cited: 70
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ID: 4399223