Journal
PLASMONICS
Volume 17, Issue 3, Pages 1091-1094Publisher
SPRINGER
DOI: 10.1007/s11468-022-01601-2
Keywords
Metal-enhanced fluorescence; Plasmonics; Quantum yield
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This passage discusses the evaluation method for the suitability of nanostructures for metal-enhanced fluorescence (MEF). It suggests that F = F-q0=1, with q(0) = 1 as a constraint, is a suitable figure of merit for plasmonic structures involved in MEF. Any other realistic F in the MEF regime can be obtained from F-q0=1 by a simple 1/q(0) scaling.
A suitability of a nanostructure for a metal-enhanced fluorescence (MEF) is usually assessed from the value of the maximal fluorescence enhancement factor, F, which it can generate. However, F is an ambiguous quantity which may dramatically depend on the intrinsic quantum yield, q(0), of the emitter in a free space. Here, we suggest F = F-q0=1 taken in the limiting case of q(0) = 1 as a proper figure of merit for a plasmonic structure involved in MEF. Any other realistic F in the MEF regime can be recovered from F-q0=1 by a simple 1/q(0) scaling.
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