Self‐Assembled Silicon@Silica Metasurfaces with High‐Quality Resonances in the Infrared

• DOI: 10.1002/smsc.202500119
• Publication Date: 2025-05-15T11:14:52Z
• Authors: Megan A. Parker; Raul Barbosa; Cynthia Cibaka‐Ndaya; Alexander Castro‐...; Maria Letizia De ...; Brian A. Korgel; David Montero; Sabrina Lacomme; Antoine Azéma; Vasyl G. Kravets; Alexander N. Grig...; Virginie Ponsinet; Philippe Barois; Lucien Roach; Glenna L. Drisko

2D assemblies of resonant dielectric particles constitute promising materials for the next generation 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 high degree positional disorder size dispersion particles. This work presents fabrication core–shell silicon@silica with multipolar resonances in visible near‐infrared. These are then assembled at an air–water interface into a semi‐ordered array islands crystallinity. The assembly is deposited on quartz properties characterized ellipsometry microscopy. effective medium this material appears display magnetic resonance high‐quality factor ≈945 nm, as demonstrated by Lorentzian permeability. Thus, first silicon particle known generate magnetism, giving promise scalable production high‐performance metasurfaces, spite imperfections associated fabrication.