Transfer-printed quantum-dot nanolasers on a silicon photonic circuit

Abstract

Quantum-dot (QD) nanolasers integrated on a silicon photonic circuit are\ndemonstrated for the first time. QD nanolasers based on one-dimensional\nphotonic crystal nanocavities containing InAs/GaAs QDs are integrated on\nCMOS-processed silicon waveguides cladded by silicon dioxide. We employed\ntransfer-printing, whereby the three-dimensional stack of photonic\nnanostructures is assembled in a simple pick-and-place manner. Lasing operation\nand waveguide-coupling of an assembled single nanolaser are confirmed through\nmicro-photoluminescence spectroscopy. Furthermore, by repetitive\ntransfer-printing, two QD nanolasers integrated onto a single silicon waveguide\nare demonstrated, opening a path to develop compact light sources potentially\napplicable for wavelength division multiplexing.\n