Spectral profile modification model

Figure 2.2 Predictions of spectral profile modifications in MEF for a few model cases. Spectra are shown in terms of Raman shift (equivalent to COg ), assuming a laser excitation at 633 nm. All spectra are normalized to 1. (a)...

In order to discuss any modification to the fluorescence spectral profile, it is important to first understand its origin for a free fluorophore. The model of fluorescence that we discuss below has been simplified as much as possible and retains only the features that are necessary for the generalization to the MEF... 

The EM theory of Metal Enhanced Fluorescence (MEF) was studied and developed extensively in the 70-80 s [2,3,4,5,6], All the EM mechanims involved in MEF can be understood within classical EM theory [3,4,5,6] as confirmed in the simplest cases by quantum studies [2,12,17,18], In most of these models, the emitter is depicted as a simple two- (or three-) level system, i.e. only one emission wavelength is considered. This is appropriate in general to understand modifications of absorption or emission rates, but it entirely ignores the spectral profile of the fluorescence emission. We will first review... 

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