A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Few-Molecule Strong Coupling with Dimers of Plasmonic Nanoparticles Assembled on DNA (2021)

Heintz, J., Markešević, N., Gayet, E. Y., Bonod, N., & Bidault, S. (2021). Few-Molecule Strong Coupling with Dimers of Plasmonic Nanoparticles Assembled on DNA. ACS Nano, 15(9), 14732-14743. https://doi.org/10.1021/acsnano.1c04552

JYU-tekijät tai -toimittajat

Markesevic, Nemanja

Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Heintz, Jeanne; Markešević, Nemanja; Gayet, Elise Y.; Bonod, Nicolas; Bidault, Sébastien

Lehti tai sarja: ACS Nano

ISSN: 1936-0851

eISSN: 1936-086X

Julkaisuvuosi: 2021

Ilmestymispäivä: 01.09.2021

Volyymi: 15

Lehden numero: 9

Artikkelin sivunumerot: 14732-14743

Kustantaja: American Chemical Society (ACS)

Julkaisumaa: Yhdysvallat (USA)

Julkaisun kieli: englanti

DOI: https://doi.org/10.1021/acsnano.1c04552

Julkaisun avoin saatavuus: Ei avoin

Julkaisukanavan avoin saatavuus:

Tiivistelmä

Hybrid nanostructures, in which a known number of quantum emitters are strongly coupled to a plasmonic resonator, should feature optical properties at room temperature such as few-photon nonlinearities or coherent superradiant emission. We demonstrate here that this coupling regime can only be reached with dimers of gold nanoparticles in stringent experimental conditions, when the interparticle spacing falls below 2 nm. Using a short transverse DNA double-strand, we introduce five dye molecules in the gap between two 40 nm gold particles and actively decrease its length down to sub-2 nm values by screening electrostatic repulsion between the particles at high ionic strengths. Single-nanostructure scattering spectroscopy then evidence the observation of a strong-coupling regime in excellent agreement with electrodynamic simulations. Furthermore, we highlight the influence of the planar facets of polycrystalline gold nanoparticles on the probability of observing strongly coupled hybrid nanostructures.

YSO-asiasanat: fotoniikka; fluoresenssi; nanohiukkaset; spektroskopia

Vapaat asiasanat: strong coupling; fluorescence; DNA; nanophotonics

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