Long-wavelength electromagnetic propagation in magnetoplasmonic core-shell nanostructures.
Our goal is to estimate the validity of the product rule by computing the effective permittivity and magnetic permeability of magnetoplasmonic core-shell (CS) nanostructures. We discuss the departure of the simulation from the quasistatic mean-field product rule when calculated close from resonance. The corrections to mean-field analysis are shown to be so large at a high fraction of CS inclusion that they can exceed the mean-field value by more than 750% (at the plasmon resonance). It is further shown how the spatially nonuniform electric and magnetic field enhancements extend over nanometer length scales.
Essone Mezeme
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Lab-STICC, Université Européenne de Bretagne-Université de Brest, CS 93837, 6 Avenue Le Gorgeu, 29238 Brest Cedex 3, France.
Lasquellec
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Brosseau
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