Solution-processed quantum dot nanolaser operating at telecommunication wavelength

Solution-processible nanocrystals are attracting a lot of attention as versatile active media to create a wide range of optoelectronics, including sensors, light-emitting diodes, and lasers. Continuous wave on-chip nanolaser is a necessity building block for photonic integrated circuits. However, there is no solution-processed continuous nanolaser yet. In this work, we demonstrate a tunable silicon nanobeam laser integrated with solution processed PbS quantum dots operating at room temperature and optical telecommunication window.