Electrically‐Driven 2D Semiconductor Microcavity Laser

Abstract 2D monolayered transition‐metal dichalcogenides (TMDCs) are promising materials for realizing ultracompact, low‐threshold semiconductor lasers. And the development of the electrical‐driven TMDC devices is crucial for enhancing the integration potential of practical optoelectronic systems. However, at the current stage, the electrically‐driven 2‐D TMDC laser has never been realized. Herein, the first electrically‐driven 2‐D TMDC microcavity laser have been developed. In this device, an alternating current (AC) generates electroluminescence lasing in suspended monolayered WSe 2 integrated on a microdisk cavity. The input–output curve, bandwidth narrowing, and second‐order coherence is analyzed to confirm the lasing characteristics at room temperature. The realization of the room‐temperature AC‐driven 2‐D TMDC laser establishes a new area of research on electrically pumped compact lasers and is likely to assist with the implementation of diverse TMDC‐based practical photonic devices in the future.