Electromagnetic interaction of fluorophores with designed two-dimensional silver nanoparticle arrays View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2001-09

AUTHORS

H. Ditlbacher, N. Felidj, J.R. Krenn, B. Lamprecht, A. Leitner, F.R. Aussenegg

ABSTRACT

. We study the fluorescence enhancement of dye molecules adsorbed on regular two-dimensional arrays of designed silver nanoparticles. The silver particles show two orthogonal optical resonances at different wavelengths because of their elongated shape. The short-wavelength resonance was designed to fit to the absorption maximum of the fluorophore. When the excitation light drives the short-wavelength resonance, the measured fluorescence intensity is strongly enhanced compared to that for the orthogonal particle orientation. This shows directly a strong electromagnetic coupling between the nanoparticles and the fluorophore. Additionally enhanced photochemical bleaching is observed due to the interaction of fluorophores with the particles. Using a rate model describing the fluorescence enhancement and the bleaching enhancement, an average value for the particle-induced increase in the radiative fluorescence rate is obtained, together with a lower limit for the averaged particle-induced field intensity enhancement factor. More... »

PAGES

373-377

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s003400100700

DOI

http://dx.doi.org/10.1007/s003400100700

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1005780086


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