Gap enhanced fluorescence as a road map for the detection of very weakly fluorescent emitters from visible to ultraviolet

McArthur, Duncan and Papoff, Francesco (2017) Gap enhanced fluorescence as a road map for the detection of very weakly fluorescent emitters from visible to ultraviolet. Scientific Reports, 7. 14191. ISSN 2045-2322 (https://doi.org/10.1038/s41598-017-14250-x)

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Abstract

We analyze the enhancement of the rates of both the emission and the far field radiation for dipoles placed in the gap between a metallic nanorod, or nanosphere, and a metallic substrate. For wavelengths between 150 nm and 650 nm, the response of the gapped nanostructures considered in this work is dominated by few principal modes of the nanoparticle, which include self- consistently the effect of the substrate. For wavelengths shorter than 370 nm, the far field radiative enhancements of aluminum nanostructures are significantly higher than those for gold or silver. With aluminum, bright mode resonances are tunable over tens or hundreds of nanometers by changing the size of the nanoparticle and have far field radiative enhancements of up to three orders of magnitude. These results provide a road map to label-free detection of many emitters too weakly fluorescent for present approaches.

ORCID iDs

McArthur, Duncan ORCID logoORCID: https://orcid.org/0000-0001-8603-8349 and Papoff, Francesco ORCID logoORCID: https://orcid.org/0000-0002-3456-343X;
  • Item type:Article
    ID code:61986
    Dates:
    Date
    Event
    27 October 2017
    Published
    9 October 2017
    Accepted
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:10 Oct 2017 08:44
    Last modified:11 Nov 2024 11:47
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/61986
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