Phys.org  December 30, 2022 Nanophotonic light emitters are key components in numerous application areas because of their compactness and versatility. An international team of researchers (South Korea, UK, USA – Pennsylvania State University, University of Pittsburg, Singapore) has proposed a topological beam emitter structure that takes advantage of submicrometer footprint size, small divergence angle, high efficiency, and adaptable beam shaping capability. The proposed structure consists of a topological junction of two guided-mode resonance gratings inducing a leaky Jackiw-Rebbi state resonance which leads to in-plane optical confinement with funnel-like energy flow and enhanced emission probability, resulting in highly efficient optical beam […]