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Fano interference in supported gold nanosandwiches with weakly coupled nanodisks.
Opt Express
December 2012
Cinvestav-IPN, Unidad Querétaro, Libramiento Norponiente 2000, 76230 Querétaro, Mexico.
We studied the far-field optical response of supported gold-silica-gold nanosandwiches using spectroscopic ellipsometry, reflectance and transmittance measurements. Although transmittance data clearly shows that the gold nanodisks in the sandwich structure interact very weakly, oblique reflectance spectra of s- and p-polarized light show clearly asymmetric line-shapes of the Fano type. However, all experimental results are very well described by modeling the gold nanodisks as oblate spheroids and by employing a 2 × 2 scattering matrix formulation of the Fresnel coefficients provided by an island film theory.
View Article and Find Full Text PDFGold-silica-gold nanosandwiches: tunable bimodal plasmonic resonators.
Small
February 2007
Department of Applied Physics, Chalmers University of Technology, Göteborg, Sweden.
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