[11p-E310-1~11] 3.11 Nanoscale optical science and near-field optics

2:45 PM - 3:00 PM JST(5:45 AM - 6:00 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[11p-E310-7] Angle-Dependent Structural Coloration Based on Higher-Order Mie Resonances in
Silicon Nanoparticle Monolayers

〇(M2)Yosuke Ito¹, Jialu Song¹, Hiroshi Sugimoto¹, Minoru Fujii¹ (1.Kobe Univ.)

Keywords:

Mie resonance,Metasurface,Structural color

We report the angular dependence of structural coloration from a crystalline silicon nanoparticle monolayer that exhibits Mie resonances in the visible range. For a monolayer composed of particles with diameters around 200 nm, we found that the reflection color changes abruptly at a specific incident angle under TM-polarized illumination. This response suggests the contribution of higher-order Mie resonant modes with complex radiation patterns. In the presentation, we analyze the underlying mechanism from both computational and experimental perspectives and demonstrate angle-dependent structural coloration distinct from conventional iridescence.