title: Emission characterization of a single CdSe-ZnS nanocrystal with high temporal and spectral resolution by photon-correlation Fourier spectroscopy.
abstract: We report a spectroscopic study of single colloidal CdSe/ZnS nanocrystals at low temperature. We use photon-correlation Fourier spectroscopy, a technique based on measuring the correlations of the intensities detected at the outputs of a Michelson interferometer. Spectral diffusion over a few microeV is evidenced, on a typical time scale of 200 micros. A time resolution as high as 20 micros is obtained, and an upper limit of 6.5 microeV emission linewidth is measured, corresponding to a coherence time of at least 200 ps, similar to the values for epitaxial quantum dots.
authors.affiliation: Laboratoire Kastler Brossel, Ecole normale supérieure, Université Pierre et Marie Curie Paris 6, CNRS, 24 rue Lhomond, 75231 Paris Cedex 05, France.
authors.forename: L
authors.initials: L
authors.lastname: Coolen
authors.forename: X
authors.initials: X
authors.lastname: Brokmann
authors.forename: P
authors.initials: P
authors.lastname: Spinicelli
authors.forename: J-P
authors.initials: JP
authors.lastname: Hermier