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Effect of the plasmon-exciton interaction on optical properties of core-shell nanoparticles

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Abstract

The plasmon-exciton interaction in composite nanoparticles consisting of a metal (Au) core coated with two layers of organic materials, i.e., a monomolecular dielectric interlayer and a layer of cyanine dye J-aggregate was studied. In contrast to previously studied systems, metal in nanoobjects under consideration is at a distance of 1.2 nm from the J-aggregate, which allows maintaining the interaction of metal plasmons and J-aggregate excitons and weakening luminescence quenching at the same time. The particle morphology was studied by transmission electron and atomic-force microscopy. Bands caused by the dye J-aggregate formation on the surface were detected in the absorption spectrum of such particles. Fast dynamics (several picoseconds) of optical density variation was detected by the pump-probe method. The photoluminescence spectrum contains a narrowband characteristic of J-aggregates, which is excited due to a locally strengthened field of metal core plasmons.

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Authors and Affiliations

  1. Moscow Institute of Physics and Technology (State University), Institutskii per. 9, Dolgoprudnyi, Moscow oblast, 141700, Russia

    D. N. Vasil’ev & D. A. Chubich

  2. Lebedev Physical Institute, Russian Academy of Sciences, Leninskii pr. 53, Moscow, 119991, Russia

    D. N. Vasil’ev & D. A. Chubich

  3. Lomonosov State Academy of Fine Chemical Technology, pr. Vernadskogo 86, Moscow, 119571, Russia

    E. S. Koltsova

Authors
  1. D. N. Vasil’ev
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  2. E. S. Koltsova
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  3. D. A. Chubich
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Corresponding author

Correspondence to D. A. Chubich.

Additional information

Original Russian Text © D.N. Vasil’ev, E.S. Koltsova, D.A. Chubich, 2010, published in Kratkie Soobshcheniya po Fizike, 2010, Vol. 37, No. 3, pp. 39–42.

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Vasil’ev, D.N., Koltsova, E.S. & Chubich, D.A. Effect of the plasmon-exciton interaction on optical properties of core-shell nanoparticles. Bull. Lebedev Phys. Inst. 37, 87–88 (2010). https://doi.org/10.3103/S1068335610030061

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  • DOI: https://doi.org/10.3103/S1068335610030061

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