Controlling the transverse magneto-optical Kerr effect with near-zero refractive index bi-gyrotropic metamaterials

Almpanis, Evangelos; Amanollahi, Mansoureh; Zamani, Mehdi

doi:10.1016/j.optmat.2019.109539

Cited by 5 publications

(1 citation statement)

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“…Although this MO effect is of the order of 10 −3 in conventional ferromagnetic surfaces [9], hindering applications, researchers have demonstrated enhancements of up to three orders of magnitude when using a nanostructured metallic surface, where the surface plasmon resonances (SPRs) are excited [10][11][12][13]. An important application of these nanostructures is magnetoplasmonic biosensing [14][15][16][17], which merges the sharp resonances of TMOKE with the high sensitivity of SPRs to small changes in the surrounding dielectric environment for improved sensing resolutions.…”

Section: Introductionmentioning

confidence: 99%

Bulk Plasmon Polariton Modes in Hyperbolic Metamaterials for Giant Enhancement of the Transverse Magneto-Optical Kerr Effect

et al. 2022

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We demonstrate a concept for the giant enhancement of the transverse magneto-optical Kerr effect (TMOKE) using bulk plasmon polariton (BPP) modes in non-magnetic multilayer hyperbolic metamaterials (HMMs). Since the BPP modes are excited through the attenuated total reflection (ATR) mechanism, using a Si-based prism-coupler, we considered a single dielectric magneto-optical (MO) spacer between the prism and the HMM. The working wavelength was estimated, using the effective medium approach for a semi-infinite dielectric-plasmonic multilayer, considering the region where the system exhibits type II HMM dispersion relations. Analytical results, by means of the scattering matrix method (SMM), were used to explain the physical principle behind our concept. Numerical results for giant TMOKE values (close to their maximum theoretical values, ±1) were obtained using the finite element method (FEM), applying the commercial software COMSOL Multiphysics. Our proposal comprises a simple and experimentally feasible structure that enables the study of MO phenomena in HMMs, which may find application in future nanostructured magnetoplasmonic metamaterials for active nanophotonic devices.

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