Photochromic control of a plasmon–quantum dots coupled system

Abstract : The control of quantum dot (QD) photoluminescence (PL) is a challenge for many applications. It is well known that plasmonic resonances can enhance this PL. In this work, we couple QDs with silver nanoparticles and immerse the system in a photochromic organic material. As these molecules are optical switches going from a transparent to a colored isomer by absorbing UV light, we observe on one hand a Förster Resonant Energy Transfer (FRET) between the QD emission and the absorbing isomer and on the other hand a plasmonic PL enhancement. The photochromic transition leads to the optical control of the FRET, allowing us to control the QD de-excitation preferences (radiative or non-radiative) and so the emitted light.
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https://hal-utt.archives-ouvertes.fr/hal-02311021
Contributor : Jean-Baptiste Vu Van <>
Submitted on : Thursday, October 10, 2019 - 4:06:52 PM
Last modification on : Saturday, October 12, 2019 - 1:16:35 AM

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Gwénaëlle Lamri, Artur Movsesyan, Edite Figueiras, Jana Nieder, Jean Aubard, et al.. Photochromic control of a plasmon–quantum dots coupled system. Nanoscale, Royal Society of Chemistry, 2019, 11 (1), pp.258-265. ⟨10.1039/C8NR08076C⟩. ⟨hal-02311021⟩

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