Self‐Organized Lasing of Delocalized State Enabled by Non‐Hermitian Manipulation and Chiral Symmetry

Abstract Self‐organization refers to a collective resonance phenomenon whereby individual elements spontaneously arranged into ordered patterns via internal interactions. However, chaotic multimode synchronization in conventional semiconductor laser cavities imposes limitations on their performances in practical scenarios. Here, the self‐organized lasing of delocalized topological‐edge‐state (TES) that facilitates large‐scale highly coherent emission is demonstrated. Specifically, the localization of TES is suppressed by tuning the ratio of alternate coupling strengths in a large‐scale Su–Schrieffer–Heeger (SSH) model protected by chiral symmetry. TES remains dominant over the disordered background by virtue of non‐Hermitian modulation and exhibits a unique self‐organized pattern. The proposed laser is electrically pumped, with non‐Hermitian control implemented via designed electrode configurations. The high spatial coherence facilitates a lower threshold, more robust output spatial patterns and higher speckle contrasts under varying injection conditions, as compared to a photonic‐crystal (PhC) laser of the same scale. Meanwhile, TES with larger‐scale is established and a phase‐shifting coupler is introduced to further enhance the optical power density. To our knowledge, the self‐organized synchronization of delocalized TES is demonstrated for the first time in laser systems, contributing to enhanced performances in semiconductor lasers. It is believed that this mechanism can offer insights into delocalized synchronization phenomena in other dynamical systems.