Hybrid gold-(CdSe/CdS/CdZnS) nanocrystal supraparticles emission: from FRET inhibition to collective emission of a mesoscopic ensemble of NCs

we investigate the optical properties of single self-assembled hybrid gold-CdSe/CdS/CdZnS colloidal nanocrystal supraparticles. First, spectrally time resolved photoluminescence experiments show that they exhibit Fõrster resonance energy transfer (FRET) that is inhibited by the gold nanoshell, in agreement with the results of numerical simulations. Next, the analysis of the intensity autocorrelation function g(2)(x) reveals that FRET combined to non radiative Auger recombination can result in photon antibunching. Bunching at short time scale related to coherent collective emission is finally reported.

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Physique [physics]

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2302.07538.pdf (1020.17 Ko)

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Soumis le : mercredi 8 novembre 2023-10:53:17

Dernière modification le : samedi 20 avril 2024-03:30:00

Dates et versions

hal-04271857 , version 1 (08-11-2023)

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Paternité

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HAL Id : hal-04271857 , version 1

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Victor Blondot, Domitille Gérard, Guillaume Quibeuf, Christophe Arnold, Aymeric Delteil, et al.. Hybrid gold-(CdSe/CdS/CdZnS) nanocrystal supraparticles emission: from FRET inhibition to collective emission of a mesoscopic ensemble of NCs. 13th International Conference on Metamaterials, Photonic Crystals and Plasmonics, META 2023, Jul 2023, Paris, France. pp.1371-1372. ⟨hal-04271857⟩

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