Webinar to Detail Engineering Multipole Resonances in Dielectric Metasurfaces with COMSOL

Controlling Light with Dielectric Metasurfaces

Dielectric metasurfaces are flat, low-loss optical elements used to control the amplitude, phase, and polarization of light. Their performance relies on precisely engineered optical resonances, making them important for research in sensing, energy harvesting, and flat optics.

Simulation for Resonance Prediction and Understanding

Full-wave finite element simulation, integrated with semianalytical multipole decomposition in COMSOL Multiphysics, provides a method to predict these resonances and understand their physical origins. This approach helps in designing and tailoring optical responses.

Webinar Focus: From Single Atom to Metasurface

Dr. Pavel Terekhov from the National Institute of Standards and Technology will lead a webinar demonstrating this technique. He will show how a single quadrumer meta-atom evolves into different light manipulation regimes and how arranging quadrumers into a periodic crystalline silicon metasurface enhances absorption through independent multipole mechanisms. The presentation will also cover ongoing work on a gallium nitride metasurface, where four different multipoles are used to sculpt reflection and transmission spectra, including quasi-bound-states-in-the-continuum (q-BIC) manipulation.

Multipole-Based Simulation as a Design Strategy

The webinar will illustrate how COMSOL Multiphysics and multipole decomposition bridge full-wave simulation and analytical insight, transforming abstract resonance behavior into physically interpretable design rules. This multipole-based simulation serves as a design strategy for tailoring absorption, reflection, and transmission in dielectric metasurfaces, with applications in sensing, energy harvesting, and future optical devices.