LRI Particle Engineering Model

Design low-refractive-index coatings from first principles: hollow-sphere nanoparticle geometry (shell thickness, diameter, packing density) determines the effective RI via two-level effective medium theory.

Compute coating RI from nanoparticle parameters. Model hollow SiO₂ spheres at the particle level (porosity from shell thickness), then the composite coating (volume fraction in binder). See how each parameter drives the RI from 1.16 to 1.40. Includes reflectance spectrum and quarter-wave design guidance.