Towards Integrated Quantum Photonic Circuits on GaAs

Integrated quantum photonic circuits are promising for an on-chip realization of a quantum advantage. It is desirable to develop a platform which allows dense integration of functionalities, which includes sources, photon processing units and detectors on the single photon level. Among the different material platforms currently being investigated, directbandgap semiconductors and particularly gallium arsenide offer the widest range of functionalities, including single and entangled-photon generation by radiative recombination, low-loss routing, electro-optic modulation, and single-photon detection. We summarize the potential and current status in the field of quantum integrated photonic components and circuits based on the GaAs technology platform.