Extraordinary magnetooptical effects and transmission through the metal-dielectric plasmonic systems
V.I. Belotelov, L.L. Doskolovich, A.K. Zvezdin
TL;DR
This paper demonstrates significant enhancement of magnetooptical effects in metal-dielectric plasmonic systems with subwavelength holes, showing resonance peaks and the role of magnetic polaritons in the near-infrared range.
Contribution
It introduces a rigorous analysis of magnetooptical effects in perforated metallic films coupled with dielectric layers, highlighting the role of magnetic polaritons.
Findings
Resonance peaks in Faraday and Kerr spectra in near-infrared range.
Enhanced magnetooptical effects due to surface plasmon and magnetic polariton coupling.
Correlation between transmittance peaks and magnetooptical resonance effects.
Abstract
We report on significant enhancement of the magnetooptical effects in gyrotropic systems of a metallic film perforated by subwavelength hole arrays and a uniform dielectric film magnetized perpendicular to its plane. Calculations, based on a rigorous coupled-wave analysis, demonstrate the Faraday and Kerr effect spectra having several resonance peaks in the near infrared range, some of them coinciding with transmittance peaks. Qualitative analysis revealed that magnetic polaritons being coupled magnetic-film waveguiding modes with surface plasmons play a crucial role in the observed effect.
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