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Abstract: We show that the single emitter linewidth underlying a broadened ensembleemission spectrum can be extracted from correlations among the stochasticintensity fluctuations in the ensemble spectrum. Spectral correlations can beobserved at high temporal and spectral resolutions with a cross-correlated pairof avalanche photodiodes placed at the outputs of a scanning Michelsoninterferometer. As illustrated with simulations in conjunction withFluorescence Correlation Spectroscopy, our approach overcomes ensemble andtemporal inhomogeneous broadening to provide single emitter linewidths, evenfor emitters under weak, continuous, broadband excitation.



Author: Xavier Brokmann, Lisa Marshall, Moungi Bawendi

Source: https://arxiv.org/







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