Europhysics Letters (EPL)
Spectral Correlations within the Fluorescence Triplet
Gerard Nienhuis
Abstract
Spectral correlations of a light source are measured by setting the frequencies of two narrow filters at two frequencies within the spectrum of the source, and detecting the correlations between the two outputs. In the case of the fluorescence triplet of a two-level atom, correlations arise when the two filter frequencies are equal, and also when they are positioned symmetrically at opposite sides of the central driving frequency.