The authors show that energy transfer is a feasible mechanism for exciting fluorescence of single light-harvesting complexes with different characters of the fluorescing state. This approach is applied for excitons consisting of 18 strongly coupled bacteriochlorophylls in light-harvesting complex 2 as well as for peridinin-chlorophyll-protein monomers containing either two chlorophyll a molecules or a pair of chlorophyll a and chlorophyll b characterized with the emission energy difference of 400cm−1. Using this method the authors are able to observe fluorescence spectral dynamics on the scale comparable or larger than the emission linewidth of a single chromophore.
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Wörmke et al. (2007) studied this question.
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