Dielectric metasurfaces have moved to the forefront of nanophotonics, providing flat, low-loss alternate options to traditional bulk optical components for controlling the amplitude, part, and polarization of sunshine. These buildings are of rising curiosity to researchers and engineers engaged on sensing, power harvesting, and flat optics, as their efficiency hinges on exactly engineered optical resonances. Full-wave finite aspect simulation, mixed with semianalytical multipole decomposition within the COMSOL Multiphysics® software program, provides us a method to not solely predict these resonances but in addition uncover their underlying bodily origins.
On this webinar, Dr. Pavel Terekhov, postdoctoral researcher at Nationwide Institute of Requirements and Expertise, will hint how a single quadrumer meta-atom, initially studied for its magnetic octupole response, evolves into two distinct gentle manipulation regimes. He’ll first revisit the foundational single-particle outcomes that motivated this work, then present how arranging quadrumers right into a periodic crystalline silicon metasurface produces anomalous absorption enhancement, ruled by two unbiased multipole mechanisms coexisting in the identical construction. Constructing on this, he’ll then introduce ongoing work on a gallium nitride metasurface, the place the complicated interaction of 4 completely different multipoles is used to sculpt reflection and transmission spectra together with the quasi-bound-states-in-the-continuum (q-BIC) manipulation.
Attendees will see how COMSOL Multiphysics® and multipole decomposition join full-wave simulation and analytical perception, turning summary resonance conduct into bodily interpretable design guidelines. The broader takeaway is that multipole-based simulation is not only a diagnostic software however a design technique: It permits the on-demand tailoring of absorption, reflection, and transmission in dielectric metasurfaces, with direct relevance to sensing, power harvesting, and future optical gadget purposes.
Key Takeaways:
- Study modeling multipole resonances in dielectric metasurfaces utilizing full-wave finite aspect simulation and semianalytical multipole decomposition in COMSOL Multiphysics®.
- See how multipole-based simulation can be utilized to grasp and management absorption, reflection, and transmission in silicon and gallium nitride metasurfaces.
- Discover how completely different multipole mechanisms, together with quasi-bound states within the continuum (q-BICs), could be engineered to tailor optical responses for sensing, power harvesting, and flat optics.
- Acquire insights into how simulation and multipole decomposition will help researchers and engineers flip complicated resonance conduct into sensible design methods for future optical units.
