Optimizing the coupling of light to plasmons through engineered dipolar scatterers

Saad Abdullah; Jan Krpensky; Eduardo J. C. Dias; Vahagn Mkhitaryan; F. Javier García de Abajo

doi:10.1117/12.2665778

6 June 2023 Optimizing the coupling of light to plasmons through engineered dipolar scatterers

Saad Abdullah, Jan Krpensky, Eduardo J. C. Dias, Vahagn Mkhitaryan, F. Javier García de Abajo

Proceedings Volume 12568, Metamaterials XIV; 125680S (2023) https://doi.org/10.1117/12.2665778
Event: SPIE Optics + Optoelectronics, 2023, Prague, Czech Republic

Abstract

We experimentally demonstrate high coupling of light to surface polaritons by means of an optimized scatterer placed at a suitable distance from a polariton-supporting surface. Specifically, we consider poorly-absorbing gold disks acting as nearly-perfect resonant scatterers, which we separate from a gold film by means of a dielectric silica spacer. This configuration leads to resonant coupling between externally incident light and plasmon polaritons in the film with associated cross sections that approach and surpass the fundamental limit ~λ² imposed by the light wavelength λ. Our method introduces a disruptive, efficient way to solve the in/out-coupling problem in nanophotonics.

Citation Download Citation

Saad Abdullah, Jan Krpensky, Eduardo J. C. Dias, Vahagn Mkhitaryan, and F. Javier García de Abajo "Optimizing the coupling of light to plasmons through engineered dipolar scatterers", Proc. SPIE 12568, Metamaterials XIV, 125680S (6 June 2023); https://doi.org/10.1117/12.2665778

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