This work presents a detailed investigation of the near-field optical response of core-shell nanoparticles using Fourier-demodulated full-wave simulations. The authors employed JCMsuite to simulate the scattering-type scanning near-field optical microscopy (s-SNOM) measurement process for cylindrically symmetric samples. These simulations, which closely mimic the experimental procedure, were used to explore the complex interplay of geometrical and optical resonances within core-shell nanostructures, revealing significant resonance shifts and enhanced scattering effects.
D. Dai, et al. Core-Shell Nanoparticle Resonances in Near-Field Microscopy Revealed by Fourier-demodulated Full-wave Simulations. Nano Letters, 24(43), 13747 (2024).