Abstract

We describe a detailed photon correlation Fourier spectroscopy (PCFS) study of a single $\mathrm{Cd}\mathrm{Se}∕\mathrm{Zn}\mathrm{S}$ nanocrystal at $10\mathrm{K}$. PCFS provides the temporal and spectral resolution that is necessary for such a fast spectrally diffusing emitter. In the emitter spectrum, we distinguish a main $6\mu \mathrm{eV}$ zero-phonon line, the one- and two-longitudinal-optical-phonon replica, and the longitudinal-acoustic-phonon pedestal. We determine the spectral diffusion amplitude as a function of time for timescales from $20\mu \mathrm{s}\text{to}200\mathrm{ms}$ and propose an interpretation for the two observed regimes.

© 2009 Optical Society of America

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