Integrating waveguide physics into metasurface planar design achieves ultrahigh-Q flatbands and chiral responses for nanoscale light control

https://www.eurekalert.org/news-releases/1100927

"flatbands span entire nonlocal metasurface k-space selectively controlling for linearly/ circularly polarized light, extending coupled-resonator optical waveguide concept to metasurfaces... collective optics trap light producing sharper resonances/ stronger interactions with matter... tuned lateral coupling slows light to near 0 group velocity, boosting light–matter interactions with consistent resonance across different incidence angles... nonlinear quantum optics, advanced sensing, communications, compact flat-optics, sensing"