title: Silica nanoparticles as a tool for fluorescence collection efficiency enhancement.
abstract: In this work we demonstrate enhancement of the fluorescence collection efficiency for chlorophyll-containing photosynthetic complexes deposited on SiO2 spherical nanoparticles. Microscopic images of fluorescence emission reveal ring-like emission patterns associated with chlorophyll-containing complexes coupled to electromagnetic modes within the silica nanoparticles. The interaction leaves no effect upon the emission spectra of the complexes, and the transient behavior of the fluorescence also remains unchanged, which indicates no influence of the silica nanoparticles on the radiative properties of the fluorophores. We interpret this enhancement as a result of efficient scattering of electromagnetic field by the dielectric nanoparticles that increases collection efficiency of fluorescence emission.
authors.affiliation: Institute of Physics, Nicolaus Copernicus University, Grudziadzka 5, Torun 87-100, Poland. mackowski@fizyka.umk.pl.
authors.forename: Bartosz
authors.initials: B
authors.lastname: Krajnik
authors.forename: Magdalena
authors.initials: M
authors.lastname: Gajda-Rączka
authors.forename: Dawid
authors.initials: D
authors.lastname: Piątkowski
authors.forename: Piotr
authors.initials: P
authors.lastname: Nyga
authors.forename: Bartłomiej
authors.initials: B
authors.lastname: Jankiewicz
authors.forename: Eckhard
authors.initials: E
authors.lastname: Hofmann
authors.forename: Sebastian
authors.initials: S
authors.lastname: Mackowski
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