Scattering Spectroscopy of Plasmonic Janus Particles

Abstract

Plasmonic Janus particles, featuring a dielectric core with a thin metallic cap, are crucial in active matter research due to their unique optical properties that enable self-propulsion and efficient trapping. This study investigates the light scattering behavior of micrometer-sized, gold-coated Janus particles using Selective Illumination Multiplexed Fourier Plane Spectroscopy, analyzing their response to wavelength, illumination angle, and scattering angle. Finite-element simulations complement the experimental findings, linking spectral markers to orientation-dependent surface plasmon modes. Plans include exploring enhanced orientation detection techniques and examining light-induced forces on these particles.