Significant decrease of the optical losses in the coupling between colloidal CdSe/CdS nanocrystals and a flat gold film at cryogenic temperature - Archive ouverte HAL Access content directly
Journal Articles Physical Review B: Condensed Matter and Materials Physics (1998-2015) Year : 2017

Significant decrease of the optical losses in the coupling between colloidal CdSe/CdS nanocrystals and a flat gold film at cryogenic temperature

Abstract

We investigate the influence of the temperature (between 4 K and room temperature) on the fluorescence of colloidal thick-shell CdSe/CdS nanocrystals coupled with a flat gold film. First, we deduce the complex dielectric function ${g}$ from the spectrophotometric measurements on the flat gold film. Then, when compared to a nanocrystal deposited on a glass coverslip, calculations show that the enhancement of the photoluminescence decay rate is divided by a factor of 2.3 between 11 and 293 K due to the reduction of optical losses. Our analysis well accounts for the experiments performed on single CdSe/CdS nanocrystals.
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Dates and versions

hal-02353144 , version 1 (09-04-2024)

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A. Coste, F. Eloi, C. Arnold, Gérard Colas des Francs, Xavier Quélin, et al.. Significant decrease of the optical losses in the coupling between colloidal CdSe/CdS nanocrystals and a flat gold film at cryogenic temperature. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2017, 96 (19), pp.195416. ⟨10.1103/PhysRevB.96.195416⟩. ⟨hal-02353144⟩
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