Numerical investigation of dynamic plasmonic color generated via photothermal deformation of a metal semi-shell structure

Dyes and pigments for coloring have issues such as fading, stability at high temperatures, and submicron coloration. To solve these issues and realize a coloring method that is easily applicable to larger areas at a lower cost, we study plasmonic coloring using dynamic wavelength tuning via photothermal deformation of self-assembled metal semi-shell nanoparticles. Using discrete dipole approximation on a nanoparticle with a photothermally deformable metal semi-shell, we construct chromaticity diagrams for various substrate materials, semi-shell materials, and nanoparticle densities as well as present the possibility of achieving a wide color gamut by plasmonic coloration.