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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 mu eV is evidenced, on a typical time scale of 200 mu s. A time resolution as high as 20 mu s is obtained, and an upper limit of 6.5 mu eV emission linewidth is measured, corresponding to a coherence time of at least 200 ps, similar to the values for epitaxial quantum dots.
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https://hal.archives-ouvertes.fr/hal-01281538
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Submitted on : Wednesday, March 2, 2016 - 12:49:43 PM
Last modification on : Thursday, November 18, 2021 - 4:12:06 AM

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L. Coolen, X. Brokmann, P. Spinicelli, J. -P. Hermier. Emission characterization of a single CdSe-ZnS nanocrystal with high temporal and spectral resolution by photon-correlation fourier spectroscopy. Physical Review Letters, American Physical Society, 2008, 100 (2), pp.027403. ⟨10.1103/PhysRevLett.100.027403⟩. ⟨hal-01281538⟩

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