Article Dans Une Revue Small Science Année : 2025

Self‐assembled silicon@silica metasurfaces with high‐quality resonances in the infrared

Raul Barbosa
Brian Korgel
Sabrina Lacomme
Vasyl Kravets

Résumé

2D assemblies of resonant dielectric particles constitute promising materials for the next generation of photonic devices, thanks to their low optical losses and intense electromagnetic response. However, bottom‐up synthesis methods present many difficulties when targeting metasurface applications, particularly due to the high degree of positional disorder and the size dispersion of the resonant particles. This work presents the fabrication of core–shell silicon@silica particles with multipolar resonances in the visible and near‐infrared. These resonant particles are then assembled at an air–water interface into a semi‐ordered array with islands of crystallinity. The assembly is deposited on quartz and the optical properties are characterized with ellipsometry and optical microscopy. The effective medium of this material appears to display a magnetic resonance with a high‐quality factor at ≈945 nm, as demonstrated by a Lorentzian resonance in the permeability. Thus, this is the first bottom‐up synthesis of silicon particle assemblies known to generate optical magnetism, giving promise for the scalable production of high‐performance metasurfaces, in spite of the imperfections associated with bottom‐up fabrication.

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A comme partie 10.5281/zenodo.15100714 Jeu de données Parker, M. L., & Drisko, G. L. (2025). Self-assembled silicon@silica metasurfaces with high-quality resonances in the infrared (Version 1) [Data set]. Zenodo. https://doi.org/10.5281/ZENODO.15100714

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Dates et versions

hal-05073489 , version 1 (19-05-2025)

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Megan Parker, Raul Barbosa, Cynthia Cibaka-Ndaya, Alexander Castro-Grijalba, Maria Letizia de Marco, et al.. Self‐assembled silicon@silica metasurfaces with high‐quality resonances in the infrared. Small Science, 2025, 5 (7), pp.2500119. ⟨10.1002/smsc.202500119⟩. ⟨hal-05073489⟩
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