Characterization of the on-chip cavity coupled emission of 2D materials at room temperature

Light sources or lasers based on two-dimensional (2D) materials have been recently demonstrated with different photonic cavities emitting into free space. However, on-chip lasing based on 2D materials remains challenging. We present the characterization of on-chip cavity coupled emission from 2D materials and observe laser-like emission properties. We report 30% linewidth narrowing and a ‘kink’ in the input vs. output power relation of a device consisting of a monolayer WSe₂ monolithically integrated with a high-quality factor microring resonator operating at room temperature. Our device could ultimately enable fully integrated devices where all on-chip active functionalities are mediated by 2D materials.