[18a-WL2_201-1~10] 3.11 Nanoscale optical science and near-field optics

10:30 AM - 10:45 AM JST(1:30 AM - 1:45 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[18a-WL2_201-6] Silicon Core Silica Shell Nanoparticle Monolayer for Highly Reflective Structural Coloration

〇Yosuke Ito¹, Jialu Song¹, Keisuke Moriasa¹, Mojtaba Karimi Habil¹, Hiroshi Sugimoto¹, Minoru Fujii¹ (1.Kobe Univ.)

Keywords:

Structural color,Metasurface,Mie resonance

We report on the structural coloration arising from two-dimensionally arranged monolayers of core-shell (Si@SiO₂) particles. These particles consist of crystalline silicon (Si) cores coated with silica shells. The Si cores exhibit vivid scattering colors in the visible range due to Mie resonances. While the total reflectance of a monolayer without shells is limited to approximately 50%, the core-shell structure enhances this value to around 70%. We discuss the mechanism of this reflectance enhancement induced by the silica shell, utilizing both computational simulations and experimental results.