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Article Dans Une Revue Journal of the Optical Society of America B Année : 2019

Influence of spatial dispersion on surface plasmons, nanoparticles and grating couplers

Armel Pitelet
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Emmanuel Centeno
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Antoine Moreau
Nikolai Schmitt
  • Fonction : Auteur
Claire Scheid
Dimitrios Loukrezis
  • Fonction : Auteur
Herbert de Gersem
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Cristian Ciraci
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Résumé

Recent experiments have shown that spatial dispersion may have a conspicuous impact on the response of plasmonic structures. This suggests that in some cases the Drude model should be replaced by more advanced descriptions that take spatial dispersion into account, like the hydro-dynamic model. Here we show that nonlocality in the metallic response affects surface plasmons propagating at the interface between a metal and a dielectric with high permittivity. As a direct consequence, any nanoparticle with a radius larger than 20 nm can be expected to be sensitive to spatial dispersion whatever its size. The same behavior is expected for a simple metallic grating allowing the excitation of surface plasmons, just as in Woods famous experiment. Finally, we carefully set up a procedure to measure the signature of spatial dispersion precisely, leading the way for future experiments. Importantly, our work suggests that for any plasmonic structure in a high permittivity dielectric, nonlocality should be taken into account.
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Dates et versions

hal-02088232 , version 1 (02-04-2019)

Identifiants

  • HAL Id : hal-02088232 , version 1

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Armel Pitelet, Emmanuel Centeno, Antoine Moreau, Nikolai Schmitt, Claire Scheid, et al.. Influence of spatial dispersion on surface plasmons, nanoparticles and grating couplers. Journal of the Optical Society of America B, 2019. ⟨hal-02088232⟩
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