We have developed a novel Si₃N₄-Si quantum photonic platform for continuous-variable (CV) quantum optics operations, which will also be used to implement a quantum random number generation (QRNG) chip. The platform is packaged with a low-noise, high-speed transimpedance amplifier (TIA) circuit board in an enclosure to form a portable readout module for on-board homodyne detection of quantum noise.

Currently, no photonic platform can integrate active semiconductor devices with low-loss, anomalous-dispersion thick Si₃N₄ waveguides. We presents a novel manufacturing approach to realize such a platform. For rapid testing of the designed photonic IC (PIC), the multi-channel electronic IC and PIC are mounted on separate PCBs, enabling simultaneous multiple homodyne detections of quantum noise.

CV quantum optics enables room-temperature and deterministic quantum operations, making them ideal for quantum communication, computing, and sensing. Yet, most current systems are bulky and unsuitable for real applications. Our project’s integrated quantum photonics platform addresses this challenge by implementing quantum optics on a chip, delivering a compact, practical, and scalable solution.