Quantum Photonic Integrated Circuits (Q-PICs) chips are playing a pivotal role in achieving the dense integration necessary for scalable quantum technologies. In this talk, I will introduce essential Q-PIC components, notably nonlinear waveguide photon sources that operate across a broad spectrum, extending from visible to telecom wavelengths. I will also delve into the development of efficient circuitry for manipulating photonic qubits, in particular, thermo-optic phase shifters that operate using just a milliWatt and high performance Silicon electro-optic modulators. I will also discuss the packaging of Q-PICs, in particular, low-loss fiber-to-chip coupling, flip-chip integration with electronic interconnects and heterogeneous integration of nonlinear and III-V materials using Micro-Transfer Printing and Photonic Wire Bonding.
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