Electric field-resistant nanolasing of perovskite submicron cubes via morphology-controlled synthesis

The integration of perovskite nanolasers into on-chip photonic circuits demands high stability under strong electric fields. In this study, we developed high-quality all-inorganic CsPbBr₃ submicron cubes through an oleic acid-assisted crystallization method and demonstrated their excellent lasing performance even in high-electric-field environments. The oleic acid-controlled synthesis yields uniform cubes with high crystallinity and smooth surfaces, enabling lower threshold and single-mode lasing with a narrow linewidth (0.22 nm) and a high Q factor (2447). Notably, these cubes exhibit strong electric field resistance, maintaining stable lasing under biases up to 75 kV/cm, including in highly nonuniform fields between electrodes. This work underscores the importance of morphology control in achieving optically efficient and electrically robust nanolasers for practical on-chip photonic applications.