Mr. Gerges El Haber Profile

Gerges El Haber

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Proceedings Article | 9 March 2024 Presentation

Magneto-optical functionalized surfaces for sensing applications

Laure Bsawmaii, Pascal Giraud, Gerges El Haber, Damien Jamon, François Royer, Yves Jourlain

Proceedings Volume PC12895, PC1289518 (2024) https://doi.org/10.1117/12.3010763

KEYWORDS: Magneto-optics, Magnetism, Reflection, Optical switching, Optical gratings, Cobalt, Biosensing, Signal intensity, Plasmons, Plasmonics

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Magneto-plasmonic resonant structures, which combine magnetic and metallic materials, are well known for improving biosensing and magnetic field detection. However, these structures suffer from low optical quality resonances (reflection dip) caused by the high absorption of plasmonic oscillations, which limits their practical applications. This paper proposes low-loss optical planar structures that may hold great promise for sensing applications. The first ones are unconventional magneto-plasmonic devices optimized for a so-called configuration “optical switch” [1]. The structure consists of a 1D deep sinusoidal gold grating covered by a thin cobalt layer. The second ones are all-dielectric devices made of a magneto-optical nanocomposite layer with a 1D photoresist grating on top [2]. Such magneto-optical devices are easy to implement and cost-effective, providing a very promising approach for magnetic field sensors, or biosensing in a both directions magnetized biased configuration. [1] A. V. Tishchenko and O. Parriaux, doi: 10.1109/JPHOT.2015.2445766. [2] Laure Bsawmaii et al. doi : https://doi.org/10.1364/OME.447030

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